3 #undef Z_EXT_CHARS_IN_BUFFER
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 * Currently maintained by Cyclades team <async@cyclades.com>.
15 * For Technical support and installation problems, please send e-mail
16 * to support@cyclades.com.
18 * Much of the design and some of the code came from serial.c
19 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
20 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
21 * and then fixed as suggested by Michael K. Johnson 12/12/92.
23 * This version supports shared IRQ's (only for PCI boards).
25 * $Log: cyclades.c,v $
26 * Prevent users from opening non-existing Z ports.
28 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
29 * Fixed the PCI detection function to work properly on Alpha systems.
30 * Implemented support for TIOCSERGETLSR ioctl.
31 * Implemented full support for non-standard baud rates.
33 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
34 * Request PLX I/O region, although driver doesn't use it, to avoid
35 * problems with other drivers accessing it.
36 * Removed count for on-board buffer characters in cy_chars_in_buffer
39 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
40 * Driver now reports physical instead of virtual memory addresses.
41 * Masks were added to some Cyclades-Z read accesses.
42 * Implemented workaround for PLX9050 bug that would cause a system lockup
43 * in certain systems, depending on the MMIO addresses allocated to the
45 * Changed the Tx interrupt programming in the CD1400 chips to boost up
46 * performance (Cyclom-Y only).
47 * Code is now compliant with the new module interface (module_[init|exit]).
48 * Make use of the PCI helper functions to access PCI resources.
49 * Did some code "housekeeping".
51 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
52 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
54 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
55 * Fixed SMP locking in Cyclom-Y interrupt handler.
57 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
58 * Added a new cyclades_card field called nports to allow the driver to
59 * know the exact number of ports found by the Z firmware after its load;
60 * RX buffer contention prevention logic on interrupt op mode revisited
62 * Revisited printk's for Z debug;
63 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
65 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
66 * Fixed bug in cyz_poll that would make all ports but port 0
67 * unable to transmit/receive data (Cyclades-Z only);
68 * Implemented logic to prevent the RX buffer from being stuck with data
69 * due to a driver / firmware race condition in interrupt op mode
71 * Fixed bug in block_til_ready logic that would lead to a system crash;
72 * Revisited cy_close spinlock usage;
74 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
75 * Revisited CONFIG_PCI conditional compilation for PCI board support;
76 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
77 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
78 * Removed CTS handling from the driver -- this is now completely handled
79 * by the firmware (Cyclades-Z only);
80 * Flush RX on-board buffers on a port open (Cyclades-Z only);
81 * Fixed handling of ASYNC_SPD_* TTY flags;
82 * Module unload now unmaps all memory area allocated by ioremap;
84 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
85 * Removed CY_PROC conditional compilation;
86 * Implemented SMP-awareness for the driver;
87 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
89 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
90 * (irq=NN) as parameters (only for ISA boards);
91 * Fixed bug in set_line_char that would prevent the Cyclades-Z
92 * ports from being configured at speeds above 115.2Kbps;
93 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
94 * switching from working properly;
95 * The driver now only prints IRQ info for the Cyclades-Z if it's
96 * configured to work in interrupt mode;
98 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
99 * Added support for interrupt mode operation for the Z cards;
100 * Removed the driver inactivity control for the Z;
101 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
102 * the Z firmware is not loaded yet;
103 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
104 * same functionality;
105 * Implemented workaround for IRQ setting loss on the PCI configuration
106 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
108 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
109 * /proc entry location changed to /proc/tty/driver/cyclades;
110 * Added support to shared IRQ's (only for PCI boards);
111 * Added support for Cobalt Qube2 systems;
112 * IRQ [de]allocation scheme revisited;
113 * BREAK implementation changed in order to make use of the 'break_ctl'
115 * Fixed typo in TTY structure field 'driver_name';
116 * Included a PCI bridge reset and EEPROM reload in the board
117 * initialization code (for both Y and Z series).
119 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
120 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
121 * closed properly after a SIGINT;
122 * Module usage counter scheme revisited;
123 * Added support to the upcoming Y PCI boards (i.e., support to additional
126 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
127 * Removed all unnecessary page-alignement operations in ioremap calls
128 * (ioremap is currently safe for these operations).
130 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
131 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
132 * order to make PLX9050-based boards work with certain motherboards.
134 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
135 * cy_close function now resets (correctly) the tty->closing flag;
136 * JIFFIES_DIFF macro fixed.
138 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
139 * Fixed bug in cy_close function, which was not informing HW of
140 * which port should have the reception disabled before doing so;
141 * fixed Cyclom-8YoP hardware detection bug.
143 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
144 * Fixed bug in cy_close function, which causes malfunction
145 * of one of the first 4 ports when a higher port is closed
148 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
149 * Fixed Cyclom-4Yo hardware detection bug.
151 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
152 * /proc/cyclades implementation with great collaboration of
153 * Marc Lewis <marc@blarg.net>;
154 * cyy_interrupt was changed to avoid occurrence of kernel oopses
155 * during PPP operation.
157 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
158 * General code review in order to comply with 2.1 kernel standards;
159 * data loss prevention for slow devices revisited (cy_wait_until_sent
161 * removed conditional compilation for new/old PCI structure support
162 * (now the driver only supports the new PCI structure).
164 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
165 * added conditional compilation for new/old PCI structure support;
166 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
168 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
169 * cleaned up the data loss fix;
170 * fixed XON/XOFF handling once more (Cyclades-Z);
171 * general review of the driver routines;
172 * introduction of a mechanism to prevent data loss with slow
173 * printers, by forcing a delay before closing the port.
175 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
176 * fixed detection/handling of new CD1400 in Ye boards;
177 * fixed XON/XOFF handling (Cyclades-Z);
178 * fixed data loss caused by a premature port close;
179 * introduction of a flag that holds the CD1400 version ID per port
180 * (used by the CYGETCD1400VER new ioctl).
182 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
183 * Code review for the module cleanup routine;
184 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
185 * includes anonymous changes regarding signal_pending.
187 * Revision 2.1 1997/11/01 17:42:41 ivan
188 * Changes in the driver to support Alpha systems (except 8Zo V_1);
189 * BREAK fix for the Cyclades-Z boards;
190 * driver inactivity control by FW implemented;
191 * introduction of flag that allows driver to take advantage of
192 * a special CD1400 feature related to HW flow control;
193 * added support for the CD1400 rev. J (Cyclom-Y boards);
194 * introduction of ioctls to:
195 * - control the rtsdtr_inv flag (Cyclom-Y);
196 * - control the rflow flag (Cyclom-Y);
197 * - adjust the polling interval (Cyclades-Z);
199 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
200 * Fixes related to kernel version conditional
203 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
204 * Compatibility issues between kernels 2.0.x and
205 * 2.1.x (mainly related to clear_bit function).
207 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
208 * Changes to define the memory window according to the
211 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
212 * Changes to support new cycladesZ boards.
214 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
215 * Merge of Bentson's and Daniel's version 1.36.4.28.
216 * Corrects bug in cy_detect_pci: check if there are more
217 * ports than the number of static structs allocated.
218 * Warning message during initialization if this driver is
219 * used with the new generation of cycladesZ boards. Those
220 * will be supported only in next release of the driver.
221 * Corrects bug in cy_detect_pci and cy_detect_isa that
222 * returned wrong number of VALID boards, when a cyclomY
223 * was found with no serial modules connected.
224 * Changes to use current (2.1.x) kernel subroutine names
225 * and created macros for compilation with 2.0.x kernel,
226 * instead of the other way around.
228 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
229 * Change queue_task_irq_off to queue_task_irq.
230 * The inline function queue_task_irq_off (tqueue.h)
231 * was removed from latest releases of 2.1.x kernel.
232 * Use of macro __init to mark the initialization
233 * routines, so memory can be reused.
234 * Also incorporate implementation of critical region
235 * in function cleanup_module() created by anonymous
238 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
239 * Change to support new firmware that solves DCD problem:
240 * application could fail to receive SIGHUP signal when DCD
243 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
244 * Changed for support linux versions 2.1.X.
245 * Backward compatible with linux versions 2.0.X.
246 * Corrected illegal use of filler field in
248 * Deleted some debug messages.
250 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
251 * Included check for NULL tty pointer in cyz_poll.
253 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
254 * Bill Foster at Blarg! Online services noticed that
255 * some of the switch elements of -Z modem control
256 * lacked a closing "break;"
258 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
259 * Changed low water threshold for buffer xmit_buf
261 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
262 * Marcio provided fix to modem status fetch for -Z
264 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
265 * improve mapping of -Z control page (thanks to Steve
266 * Price <stevep@fa.tdktca.com> for help on this)
268 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
269 * shift from CPU-bound to memcopy in cyz_polling operation
271 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
272 * Added support to set and report higher speeds.
274 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
275 * Some fixes in the HW flow control for the BETA release.
276 * Don't try to register the IRQ.
278 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
279 * make sure "cyc" appears in all kernel messages; all soft interrupts
280 * handled by same routine; recognize out-of-band reception; comment
281 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
282 * fix race condition in -Z buffer management; only -Y needs to explicitly
283 * flush chars; tidy up some startup messages;
285 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
286 * shift MOD_INC_USE_COUNT location to match
287 * serial.c; purge some diagnostic messages;
289 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
290 * enable modem status messages and fetch & process them; note
291 * time of last activity type for each port; set_line_char now
292 * supports more than line 0 and treats 0 baud correctly;
293 * get_modem_info senses rs_status;
295 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
296 * barely works--now's time to turn on
297 * more features 'til it breaks
299 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
300 * check more -Z board status; shorten boot message
302 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
303 * fix reference to ch_ctrl in startup; verify return
304 * values from cyz_issue_cmd and cyz_update_channel;
305 * more stuff to get modem control correct;
307 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
308 * more -Z stuff folded in; re-order changes to put -Z stuff
309 * after -Y stuff (to make changes clearer)
311 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
312 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
313 * Add code to send break. Clear firmware ID word at startup (so
314 * that other code won't talk to inactive board).
316 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
317 * add code for -Z in set_line_char
319 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
320 * fold more -Z stuff (or in some cases, error messages)
321 * into driver; add text to "don't know what to do" messages.
323 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
324 * moved compile-time flags near top of file; cosmetic changes
325 * to narrow text (to allow 2-up printing); changed many declarations
326 * to "static" to limit external symbols; shuffled code order to
327 * coalesce -Y and -Z specific code, also to put internal functions
328 * in order of tty_driver structure; added code to recognize -Z
329 * ports (and for moment, do nothing or report error); add cy_startup
330 * to parse boot command line for extra base addresses for ISA probes;
332 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
333 * reorder some code, fix types of some vars (int vs. long),
334 * add cy_setup to support user declared ISA addresses
336 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
337 * dump ioctl based firmware load (it's now a user level
338 * program); ensure uninitialzed ports cannot be used
340 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
341 * rename vars and restructure some code
343 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
344 * get right status back after boot load
346 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
347 * successfully loads firmware
349 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
350 * add more of the code for the boot/load ioctls
352 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
353 * start to add Z functionality--starting with ioctl
354 * for loading firmware
356 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
357 * added code to recognize Z/PCI card at initialization; report
358 * presence, but card is not initialized (because firmware needs
361 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
362 * starting minor number at zero; added missing verify_area
363 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
365 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
366 * remove unneeded boot message & fix CLOCAL hardware flow
367 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
368 * remove unused diagnostic statements; minor 0 is first;
370 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
371 * The kernel function vremap (available only in later 1.3.xx kernels)
372 * allows the access to memory addresses above the RAM. This revision
373 * of the driver supports PCI boards below 1Mb (device id 0x100) and
374 * above 1Mb (device id 0x101).
376 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
377 * Some global changes to interrupt handling spilled into
378 * this driver--mostly unused arguments in system function
379 * calls. Also added change by Marcio Saito which should
380 * reduce lost interrupts at startup by fast processors.
382 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
383 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
384 * in 1.3.41 kernel to remove a possible race condition, extend
385 * some error messages, and let the driver run as a loadable module
386 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
387 * possible race condition.
388 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
390 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
391 * Changes by Linus Torvalds in 1.3.33 kernel distribution
392 * required due to reordering of driver initialization.
393 * Drivers are now initialized *after* memory management.
395 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
396 * remove printk from ISR; fix typo
398 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
399 * Minor fixes in the PCI board support. PCI function calls in
400 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
401 * <duncan@okay.com>. "bad serial count" message removed.
403 * Revision 1.36.3 1995/08/22 09:19:42 marcio
404 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
405 * board initialization. Changes in the boot messages. The driver
406 * supports up to 4 boards and 64 ports by default.
408 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
409 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
411 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
412 * add missing break in modem control block in ioctl switch statement
413 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
415 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
416 * make sure CTS flow control is set as soon as possible (thanks
417 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
419 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
420 * initialize defaults for receive threshold and stale data timeout;
423 * Revision 1.36 1995/03/10 23:33:53 bentson
424 * added support of chips 4-7 in 32 port Cyclom-Ye;
425 * fix cy_interrupt pointer dereference problem
426 * (Joe Portman <baron@aa.net>);
427 * give better error response if open is attempted on non-existent port
428 * (Zachariah Vaum <jchryslr@netcom.com>);
429 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
430 * conditional compilation for -16Y on systems with fast, noisy bus;
431 * comment out diagnostic print function;
432 * cleaned up table of base addresses;
433 * set receiver time-out period register to correct value,
434 * set receive threshold to better default values,
435 * set chip timer to more accurate 200 Hz ticking,
436 * add code to monitor and modify receive parameters
437 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
438 * <njs@scifi.emi.net>);
440 * Revision 1.35 1994/12/16 13:54:18 steffen
441 * additional patch by Marcio Saito for board detection
442 * Accidently left out in 1.34
444 * Revision 1.34 1994/12/10 12:37:12 steffen
445 * This is the corrected version as suggested by Marcio Saito
447 * Revision 1.33 1994/12/01 22:41:18 bentson
448 * add hooks to support more high speeds directly; add tytso
449 * patch regarding CLOCAL wakeups
451 * Revision 1.32 1994/11/23 19:50:04 bentson
452 * allow direct kernel control of higher signalling rates;
453 * look for cards at additional locations
455 * Revision 1.31 1994/11/16 04:33:28 bentson
456 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
457 * a problem in chars_in_buffer has been resolved by some
458 * small changes; this should yield smoother output
460 * Revision 1.30 1994/11/16 04:28:05 bentson
461 * Fix from Corey Minyard, Internet: minyard@metronet.com,
462 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
463 * cy_hangup that appears to clear up much (all?) of the
464 * DTR glitches; also he's added/cleaned-up diagnostic messages
466 * Revision 1.29 1994/11/16 04:16:07 bentson
467 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
468 * operate higher speeds in same way as other serial ports;
469 * add more serial ports (for up to two 16-port muxes).
471 * Revision 1.28 1994/11/04 00:13:16 root
472 * turn off diagnostic messages
474 * Revision 1.27 1994/11/03 23:46:37 root
475 * bunch of changes to bring driver into greater conformance
476 * with the serial.c driver (looking for missed fixes)
478 * Revision 1.26 1994/11/03 22:40:36 root
479 * automatic interrupt probing fixed.
481 * Revision 1.25 1994/11/03 20:17:02 root
482 * start to implement auto-irq
484 * Revision 1.24 1994/11/03 18:01:55 root
485 * still working on modem signals--trying not to drop DTR
486 * during the getty/login processes
488 * Revision 1.23 1994/11/03 17:51:36 root
489 * extend baud rate support; set receive threshold as function
490 * of baud rate; fix some problems with RTS/CTS;
492 * Revision 1.22 1994/11/02 18:05:35 root
493 * changed arguments to udelay to type long to get
494 * delays to be of correct duration
496 * Revision 1.21 1994/11/02 17:37:30 root
497 * employ udelay (after calibrating loops_per_second earlier
498 * in init/main.c) instead of using home-grown delay routines
500 * Revision 1.20 1994/11/02 03:11:38 root
501 * cy_chars_in_buffer forces a return value of 0 to let
502 * login work (don't know why it does); some functions
503 * that were returning EFAULT, now executes the code;
504 * more work on deciding when to disable xmit interrupts;
506 * Revision 1.19 1994/11/01 20:10:14 root
507 * define routine to start transmission interrupts (by enabling
508 * transmit interrupts); directly enable/disable modem interrupts;
510 * Revision 1.18 1994/11/01 18:40:45 bentson
511 * Don't always enable transmit interrupts in startup; interrupt on
512 * TxMpty instead of TxRdy to help characters get out before shutdown;
513 * restructure xmit interrupt to check for chars first and quit if
514 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
517 * Revision 1.17 1994/10/30 04:39:45 bentson
518 * rename serial_driver and callout_driver to cy_serial_driver and
519 * cy_callout_driver to avoid linkage interference; initialize
520 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
521 * from cyclades_port structure; add paranoia check to cy_close;
523 * Revision 1.16 1994/10/30 01:14:33 bentson
524 * change major numbers; add some _early_ return statements;
526 * Revision 1.15 1994/10/29 06:43:15 bentson
527 * final tidying up for clean compile; enable some error reporting
529 * Revision 1.14 1994/10/28 20:30:22 Bentson
530 * lots of changes to drag the driver towards the new tty_io
531 * structures and operation. not expected to work, but may
534 * Revision 1.13 1994/07/21 23:08:57 Bentson
535 * add some diagnostic cruft; support 24 lines (for testing
536 * both -8Y and -16Y cards; be more thorough in servicing all
537 * chips during interrupt; add "volatile" a few places to
538 * circumvent compiler optimizations; fix base & offset
539 * computations in block_til_ready (was causing chip 0 to
542 * Revision 1.12 1994/07/19 16:42:11 Bentson
543 * add some hackery for kernel version 1.1.8; expand
544 * error messages; refine timing for delay loops and
545 * declare loop params volatile
547 * Revision 1.11 1994/06/11 21:53:10 bentson
548 * get use of save_car right in transmit interrupt service
550 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
551 * add some diagnostic printing; try to fix save_car stuff
553 * Revision 1.10 1994/06/11 20:36:08 bentson
554 * clean up compiler warnings
556 * Revision 1.9 1994/06/11 19:42:46 bentson
557 * added a bunch of code to support modem signalling
559 * Revision 1.8 1994/06/11 17:57:07 bentson
560 * recognize break & parity error
562 * Revision 1.7 1994/06/05 05:51:34 bentson
563 * Reorder baud table to be monotonic; add cli to CP; discard
564 * incoming characters and status if the line isn't open; start to
565 * fold code into cy_throttle; start to port get_serial_info,
566 * set_serial_info, get_modem_info, set_modem_info, and send_break
567 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
568 * get flow control characters from tty struct; invalidate ports w/o
571 * Revision 1.6 1994/05/31 18:42:21 bentson
572 * add a loop-breaker in the interrupt service routine;
573 * note when port is initialized so that it can be shut
574 * down under the right conditions; receive works without
577 * Revision 1.5 1994/05/30 00:55:02 bentson
578 * transmit works without obvious errors
580 * Revision 1.4 1994/05/27 18:46:27 bentson
581 * incorporated more code from lib_y.c; can now print short
582 * strings under interrupt control to port zero; seems to
583 * select ports/channels/lines correctly
585 * Revision 1.3 1994/05/25 22:12:44 bentson
586 * shifting from multi-port on a card to proper multiplexor
587 * data structures; added skeletons of most routines
589 * Revision 1.2 1994/05/19 13:21:43 bentson
590 * start to crib from other sources
594 #define CY_VERSION "2.4"
596 /* If you need to install more boards than NR_CARDS, change the constant
597 in the definition below. No other change is necessary to support up to
598 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
603 If the total number of ports is larger than NR_PORTS, change this
604 constant in the definition below. No other change is necessary to
605 support more boards/ports. */
609 #define ZE_V1_NPORTS 64
614 #define SERIAL_PARANOIA_CHECK
616 #undef CY_DEBUG_THROTTLE
617 #undef CY_DEBUG_OTHER
619 #undef CY_DEBUG_COUNT
621 #undef CY_DEBUG_WAIT_UNTIL_SENT
622 #undef CY_DEBUG_INTERRUPTS
624 #undef CY_ENABLE_MONITORING
628 #define PAUSE __asm__("nop")
630 #define PAUSE do {} while (0)
636 #include <linux/module.h>
637 #include <linux/errno.h>
638 #include <linux/signal.h>
639 #include <linux/sched.h>
640 #include <linux/timer.h>
641 #include <linux/interrupt.h>
642 #include <linux/tty.h>
643 #include <linux/tty_flip.h>
644 #include <linux/serial.h>
645 #include <linux/major.h>
646 #include <linux/string.h>
647 #include <linux/fcntl.h>
648 #include <linux/ptrace.h>
649 #include <linux/cyclades.h>
650 #include <linux/mm.h>
651 #include <linux/ioport.h>
652 #include <linux/init.h>
653 #include <linux/delay.h>
654 #include <linux/spinlock.h>
655 #include <linux/bitops.h>
657 #include <asm/system.h>
660 #include <asm/uaccess.h>
662 #define CY_LOCK(info,flags) \
664 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
667 #define CY_UNLOCK(info,flags) \
669 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
672 #include <linux/types.h>
673 #include <linux/kernel.h>
674 #include <linux/pci.h>
676 #include <linux/stat.h>
677 #include <linux/proc_fs.h>
679 static void cy_throttle(struct tty_struct *tty);
680 static void cy_send_xchar(struct tty_struct *tty, char ch);
682 #define IS_CYC_Z(card) ((card).num_chips == -1)
684 #define Z_FPGA_CHECK(card) \
685 ((cy_readl(&((struct RUNTIME_9060 __iomem *) \
686 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
688 #define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
689 ((card).ctl_addr))->mail_box_0)) || \
690 Z_FPGA_CHECK(card)) && \
691 (ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
692 ((card).base_addr+ID_ADDRESS))->signature)))
694 #ifndef SERIAL_XMIT_SIZE
695 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
697 #define WAKEUP_CHARS 256
699 #define STD_COM_FLAGS (0)
701 static struct tty_driver *cy_serial_driver;
704 /* This is the address lookup table. The driver will probe for
705 Cyclom-Y/ISA boards at all addresses in here. If you want the
706 driver to probe addresses at a different address, add it to
707 this table. If the driver is probing some other board and
708 causing problems, remove the offending address from this table.
709 The cy_setup function extracts additional addresses from the
710 boot options line. The form is "cyclades=address,address..."
713 static unsigned int cy_isa_addresses[] = {
722 0, 0, 0, 0, 0, 0, 0, 0
725 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
728 static long maddr[NR_CARDS] = { 0, };
729 static int irq[NR_CARDS] = { 0, };
731 module_param_array(maddr, long, NULL, 0);
732 module_param_array(irq, int, NULL, 0);
735 #endif /* CONFIG_ISA */
737 /* This is the per-card data structure containing address, irq, number of
738 channels, etc. This driver supports a maximum of NR_CARDS cards.
740 static struct cyclades_card cy_card[NR_CARDS];
742 /* This is the per-channel data structure containing pointers, flags
743 and variables for the port. This driver supports a maximum of NR_PORTS.
745 static struct cyclades_port cy_port[NR_PORTS];
747 static int cy_next_channel; /* next minor available */
750 * This is used to look up the divisor speeds and the timeouts
751 * We're normally limited to 15 distinct baud rates. The extra
752 * are accessed via settings in info->flags.
753 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
754 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
758 static int baud_table[] = {
759 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
760 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
764 static char baud_co_25[] = { /* 25 MHz clock option table */
765 /* value => 00 01 02 03 04 */
766 /* divide by 8 32 128 512 2048 */
767 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
768 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
771 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
772 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
773 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
776 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
777 /* value => 00 01 02 03 04 */
778 /* divide by 8 32 128 512 2048 */
779 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
780 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
784 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
785 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
786 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
790 static char baud_cor3[] = { /* receive threshold */
791 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
792 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
797 * The Cyclades driver implements HW flow control as any serial driver.
798 * The cyclades_port structure member rflow and the vector rflow_thr
799 * allows us to take advantage of a special feature in the CD1400 to avoid
800 * data loss even when the system interrupt latency is too high. These flags
801 * are to be used only with very special applications. Setting these flags
802 * requires the use of a special cable (DTR and RTS reversed). In the new
803 * CD1400-based boards (rev. 6.00 or later), there is no need for special
807 static char rflow_thr[] = { /* rflow threshold */
808 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
809 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
813 /* The Cyclom-Ye has placed the sequential chips in non-sequential
814 * address order. This look-up table overcomes that problem.
816 static int cy_chip_offset[] = { 0x0000,
826 /* PCI related definitions */
828 static unsigned short cy_pci_nboard;
829 static unsigned short cy_isa_nboard;
830 static unsigned short cy_nboard;
832 static unsigned short cy_pci_dev_id[] = {
833 PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */
834 PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */
835 PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
836 PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
837 PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
838 PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
839 PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */
840 PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */
845 static void cy_start(struct tty_struct *);
846 static void set_line_char(struct cyclades_port *);
847 static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
849 static unsigned detect_isa_irq(void __iomem *);
850 #endif /* CONFIG_ISA */
852 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
854 #ifndef CONFIG_CYZ_INTR
855 static void cyz_poll(unsigned long);
857 /* The Cyclades-Z polling cycle is defined by this variable */
858 static long cyz_polling_cycle = CZ_DEF_POLL;
860 static int cyz_timeron = 0;
861 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
863 #else /* CONFIG_CYZ_INTR */
864 static void cyz_rx_restart(unsigned long);
865 static struct timer_list cyz_rx_full_timer[NR_PORTS];
866 #endif /* CONFIG_CYZ_INTR */
868 static inline int serial_paranoia_check(struct cyclades_port *info,
869 char *name, const char *routine)
871 #ifdef SERIAL_PARANOIA_CHECK
873 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
878 if ((long)info < (long)(&cy_port[0]) ||
879 (long)(&cy_port[NR_PORTS]) < (long)info) {
880 printk("cyc Warning: cyclades_port out of range for (%s) in "
881 "%s\n", name, routine);
885 if (info->magic != CYCLADES_MAGIC) {
886 printk("cyc Warning: bad magic number for serial struct (%s) "
887 "in %s\n", name, routine);
892 } /* serial_paranoia_check */
895 * This routine is used by the interrupt handler to schedule
896 * processing in the software interrupt portion of the driver
897 * (also known as the "bottom half"). This can be called any
898 * number of times for any channel without harm.
900 static inline void cy_sched_event(struct cyclades_port *info, int event)
902 info->event |= 1 << event; /* remember what kind of event and who */
903 schedule_work(&info->tqueue);
904 } /* cy_sched_event */
907 * This routine is used to handle the "bottom half" processing for the
908 * serial driver, known also the "software interrupt" processing.
909 * This processing is done at the kernel interrupt level, after the
910 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
911 * is where time-consuming activities which can not be done in the
912 * interrupt driver proper are done; the interrupt driver schedules
913 * them using cy_sched_event(), and they get done here.
915 * This is done through one level of indirection--the task queue.
916 * When a hardware interrupt service routine wants service by the
917 * driver's bottom half, it enqueues the appropriate tq_struct (one
918 * per port) to the keventd work queue and sets a request flag
919 * that the work queue be processed.
921 * Although this may seem unwieldy, it gives the system a way to
922 * pass an argument (in this case the pointer to the cyclades_port
923 * structure) to the bottom half of the driver. Previous kernels
924 * had to poll every port to see if that port needed servicing.
927 do_softint(struct work_struct *work)
929 struct cyclades_port *info =
930 container_of(work, struct cyclades_port, tqueue);
931 struct tty_struct *tty;
937 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
938 tty_hangup(info->tty);
939 wake_up_interruptible(&info->open_wait);
940 info->flags &= ~ASYNC_NORMAL_ACTIVE;
942 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
943 wake_up_interruptible(&info->open_wait);
944 #ifdef CONFIG_CYZ_INTR
945 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
946 if (cyz_rx_full_timer[info->line].function == NULL) {
947 cyz_rx_full_timer[info->line].expires = jiffies + 1;
948 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
949 cyz_rx_full_timer[info->line].data =
951 add_timer(&cyz_rx_full_timer[info->line]);
955 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
956 wake_up_interruptible(&info->delta_msr_wait);
959 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
960 wake_up_interruptible(&info->shutdown_wait);
965 /***********************************************************/
966 /********* Start of block of Cyclom-Y specific code ********/
968 /* This routine waits up to 1000 micro-seconds for the previous
969 command to the Cirrus chip to complete and then issues the
970 new command. An error is returned if the previous command
971 didn't finish within the time limit.
973 This function is only called from inside spinlock-protected code.
975 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
979 /* Check to see that the previous command has completed */
980 for (i = 0; i < 100; i++) {
981 if (cy_readb(base_addr + (CyCCR << index)) == 0) {
986 /* if the CCR never cleared, the previous command
987 didn't finish within the "reasonable time" */
991 /* Issue the new command */
992 cy_writeb(base_addr + (CyCCR << index), cmd);
995 } /* cyy_issue_cmd */
998 /* ISA interrupt detection code */
999 static unsigned detect_isa_irq(void __iomem * address)
1002 unsigned long irqs, flags;
1003 int save_xir, save_car;
1004 int index = 0; /* IRQ probing is only for ISA */
1006 /* forget possible initially masked and pending IRQ */
1007 irq = probe_irq_off(probe_irq_on());
1009 /* Clear interrupts on the board first */
1010 cy_writeb(address + (Cy_ClrIntr << index), 0);
1011 /* Cy_ClrIntr is 0x1800 */
1013 irqs = probe_irq_on();
1017 /* Enable the Tx interrupts on the CD1400 */
1018 local_irq_save(flags);
1019 cy_writeb(address + (CyCAR << index), 0);
1020 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1022 cy_writeb(address + (CyCAR << index), 0);
1023 cy_writeb(address + (CySRER << index),
1024 cy_readb(address + (CySRER << index)) | CyTxRdy);
1025 local_irq_restore(flags);
1030 /* Check which interrupt is in use */
1031 irq = probe_irq_off(irqs);
1034 save_xir = (u_char) cy_readb(address + (CyTIR << index));
1035 save_car = cy_readb(address + (CyCAR << index));
1036 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1037 cy_writeb(address + (CySRER << index),
1038 cy_readb(address + (CySRER << index)) & ~CyTxRdy);
1039 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1040 cy_writeb(address + (CyCAR << index), (save_car));
1041 cy_writeb(address + (Cy_ClrIntr << index), 0);
1042 /* Cy_ClrIntr is 0x1800 */
1044 return (irq > 0) ? irq : 0;
1046 #endif /* CONFIG_ISA */
1048 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1049 void __iomem * base_addr, int status, int index)
1051 struct cyclades_port *info;
1052 struct tty_struct *tty;
1053 volatile int char_count;
1054 int i, j, len, mdm_change, mdm_status, outch;
1055 int save_xir, channel, save_car;
1058 if (status & CySRReceive) { /* reception interrupt */
1059 #ifdef CY_DEBUG_INTERRUPTS
1060 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1062 /* determine the channel & change to that context */
1063 spin_lock(&cinfo->card_lock);
1064 save_xir = (u_char) cy_readb(base_addr + (CyRIR << index));
1065 channel = (u_short) (save_xir & CyIRChannel);
1066 i = channel + chip * 4 + cinfo->first_line;
1068 info->last_active = jiffies;
1069 save_car = cy_readb(base_addr + (CyCAR << index));
1070 cy_writeb(base_addr + (CyCAR << index), save_xir);
1072 /* if there is nowhere to put the data, discard it */
1073 if (info->tty == 0) {
1074 j = (cy_readb(base_addr + (CyRIVR << index)) &
1076 if (j == CyIVRRxEx) { /* exception */
1077 data = cy_readb(base_addr + (CyRDSR << index));
1078 } else { /* normal character reception */
1079 char_count = cy_readb(base_addr +
1081 while (char_count--) {
1082 data = cy_readb(base_addr +
1086 } else { /* there is an open port for this data */
1088 j = (cy_readb(base_addr + (CyRIVR << index)) &
1090 if (j == CyIVRRxEx) { /* exception */
1091 data = cy_readb(base_addr + (CyRDSR << index));
1093 /* For statistics only */
1096 else if (data & CyFRAME)
1097 info->icount.frame++;
1098 else if (data & CyPARITY)
1099 info->icount.parity++;
1100 else if (data & CyOVERRUN)
1101 info->icount.overrun++;
1103 if (data & info->ignore_status_mask) {
1107 if (tty_buffer_request_room(tty, 1)) {
1108 if (data & info->read_status_mask) {
1109 if (data & CyBREAK) {
1110 tty_insert_flip_char(
1122 } else if (data & CyFRAME) {
1123 tty_insert_flip_char(
1133 } else if (data & CyPARITY) {
1134 /* Pieces of seven... */
1135 tty_insert_flip_char(
1145 } else if (data & CyOVERRUN) {
1146 tty_insert_flip_char(
1150 /* If the flip buffer itself is
1151 overflowing, we still lose
1152 the next incoming character.
1154 tty_insert_flip_char(
1164 /* These two conditions may imply */
1165 /* a normal read should be done. */
1166 /* }else if(data & CyTIMEOUT){ */
1167 /* }else if(data & CySPECHAR){ */
1169 tty_insert_flip_char(
1175 tty_insert_flip_char(tty, 0,
1180 /* there was a software buffer
1181 overrun and nothing could be
1183 info->icount.buf_overrun++;
1184 info->idle_stats.overruns++;
1186 } else { /* normal character reception */
1187 /* load # chars available from the chip */
1188 char_count = cy_readb(base_addr +
1191 #ifdef CY_ENABLE_MONITORING
1192 ++info->mon.int_count;
1193 info->mon.char_count += char_count;
1194 if (char_count > info->mon.char_max)
1195 info->mon.char_max = char_count;
1196 info->mon.char_last = char_count;
1198 len = tty_buffer_request_room(tty, char_count);
1200 data = cy_readb(base_addr +
1202 tty_insert_flip_char(tty, data,
1204 info->idle_stats.recv_bytes++;
1210 info->idle_stats.recv_idle = jiffies;
1212 tty_schedule_flip(tty);
1214 /* end of service */
1215 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1216 cy_writeb(base_addr + (CyCAR << index), (save_car));
1217 spin_unlock(&cinfo->card_lock);
1220 if (status & CySRTransmit) { /* transmission interrupt */
1221 /* Since we only get here when the transmit buffer
1222 is empty, we know we can always stuff a dozen
1224 #ifdef CY_DEBUG_INTERRUPTS
1225 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1228 /* determine the channel & change to that context */
1229 spin_lock(&cinfo->card_lock);
1230 save_xir = (u_char) cy_readb(base_addr + (CyTIR << index));
1231 channel = (u_short) (save_xir & CyIRChannel);
1232 i = channel + chip * 4 + cinfo->first_line;
1233 save_car = cy_readb(base_addr + (CyCAR << index));
1234 cy_writeb(base_addr + (CyCAR << index), save_xir);
1236 /* validate the port# (as configured and open) */
1237 if ((i < 0) || (NR_PORTS <= i)) {
1238 cy_writeb(base_addr + (CySRER << index),
1239 cy_readb(base_addr + (CySRER << index)) &
1244 info->last_active = jiffies;
1245 if (info->tty == 0) {
1246 cy_writeb(base_addr + (CySRER << index),
1247 cy_readb(base_addr + (CySRER << index)) &
1252 /* load the on-chip space for outbound data */
1253 char_count = info->xmit_fifo_size;
1255 if (info->x_char) { /* send special char */
1256 outch = info->x_char;
1257 cy_writeb(base_addr + (CyTDR << index), outch);
1263 if (info->breakon || info->breakoff) {
1264 if (info->breakon) {
1265 cy_writeb(base_addr + (CyTDR << index), 0);
1266 cy_writeb(base_addr + (CyTDR << index), 0x81);
1270 if (info->breakoff) {
1271 cy_writeb(base_addr + (CyTDR << index), 0);
1272 cy_writeb(base_addr + (CyTDR << index), 0x83);
1278 while (char_count-- > 0) {
1279 if (!info->xmit_cnt) {
1280 if (cy_readb(base_addr + (CySRER << index)) &
1282 cy_writeb(base_addr + (CySRER << index),
1283 cy_readb(base_addr +
1284 (CySRER << index)) &
1287 cy_writeb(base_addr + (CySRER << index),
1288 (cy_readb(base_addr +
1289 (CySRER << index)) &
1290 ~CyTxRdy) | CyTxMpty);
1294 if (info->xmit_buf == 0) {
1295 cy_writeb(base_addr + (CySRER << index),
1296 cy_readb(base_addr + (CySRER << index))&
1300 if (info->tty->stopped || info->tty->hw_stopped) {
1301 cy_writeb(base_addr + (CySRER << index),
1302 cy_readb(base_addr + (CySRER << index))&
1306 /* Because the Embedded Transmit Commands have
1307 been enabled, we must check to see if the
1308 escape character, NULL, is being sent. If it
1309 is, we must ensure that there is room for it
1310 to be doubled in the output stream. Therefore
1311 we no longer advance the pointer when the
1312 character is fetched, but rather wait until
1313 after the check for a NULL output character.
1314 This is necessary because there may not be
1315 room for the two chars needed to send a NULL.)
1317 outch = info->xmit_buf[info->xmit_tail];
1320 info->xmit_tail = (info->xmit_tail + 1) &
1321 (SERIAL_XMIT_SIZE - 1);
1322 cy_writeb(base_addr + (CyTDR << index), outch);
1325 if (char_count > 1) {
1327 info->xmit_tail = (info->xmit_tail + 1)&
1328 (SERIAL_XMIT_SIZE - 1);
1329 cy_writeb(base_addr + (CyTDR << index),
1331 cy_writeb(base_addr + (CyTDR << index),
1341 if (info->xmit_cnt < WAKEUP_CHARS) {
1342 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1345 /* end of service */
1346 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1347 cy_writeb(base_addr + (CyCAR << index), (save_car));
1348 spin_unlock(&cinfo->card_lock);
1351 if (status & CySRModem) { /* modem interrupt */
1353 /* determine the channel & change to that context */
1354 spin_lock(&cinfo->card_lock);
1355 save_xir = (u_char) cy_readb(base_addr + (CyMIR << index));
1356 channel = (u_short) (save_xir & CyIRChannel);
1357 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1358 info->last_active = jiffies;
1359 save_car = cy_readb(base_addr + (CyCAR << index));
1360 cy_writeb(base_addr + (CyCAR << index), save_xir);
1362 mdm_change = cy_readb(base_addr + (CyMISR << index));
1363 mdm_status = cy_readb(base_addr + (CyMSVR1 << index));
1365 if (info->tty == 0) { /* no place for data, ignore it */
1368 if (mdm_change & CyANY_DELTA) {
1369 /* For statistics only */
1370 if (mdm_change & CyDCD)
1372 if (mdm_change & CyCTS)
1374 if (mdm_change & CyDSR)
1376 if (mdm_change & CyRI)
1379 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1382 if ((mdm_change & CyDCD) &&
1383 (info->flags & ASYNC_CHECK_CD)) {
1384 if (mdm_status & CyDCD) {
1385 cy_sched_event(info,
1386 Cy_EVENT_OPEN_WAKEUP);
1388 cy_sched_event(info, Cy_EVENT_HANGUP);
1391 if ((mdm_change & CyCTS) &&
1392 (info->flags & ASYNC_CTS_FLOW)) {
1393 if (info->tty->hw_stopped) {
1394 if (mdm_status & CyCTS) {
1395 /* cy_start isn't used
1397 info->tty->hw_stopped = 0;
1398 cy_writeb(base_addr +
1400 cy_readb(base_addr +
1404 cy_sched_event(info,
1405 Cy_EVENT_WRITE_WAKEUP);
1408 if (!(mdm_status & CyCTS)) {
1409 /* cy_stop isn't used
1411 info->tty->hw_stopped = 1;
1412 cy_writeb(base_addr +
1414 cy_readb(base_addr +
1421 if (mdm_change & CyDSR) {
1423 if (mdm_change & CyRI) {
1426 /* end of service */
1427 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1428 cy_writeb(base_addr + (CyCAR << index), save_car);
1429 spin_unlock(&cinfo->card_lock);
1433 /* The real interrupt service routine is called
1434 whenever the card wants its hand held--chars
1435 received, out buffer empty, modem change, etc.
1437 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1440 struct cyclades_card *cinfo;
1441 void __iomem *base_addr, *card_base_addr;
1447 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1448 #ifdef CY_DEBUG_INTERRUPTS
1449 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1451 return IRQ_NONE; /* spurious interrupt */
1454 card_base_addr = cinfo->base_addr;
1455 index = cinfo->bus_index;
1457 /* This loop checks all chips in the card. Make a note whenever
1458 _any_ chip had some work to do, as this is considered an
1459 indication that there will be more to do. Only when no chip
1460 has any work does this outermost loop exit.
1464 for (chip = 0; chip < cinfo->num_chips; chip++) {
1465 base_addr = cinfo->base_addr +
1466 (cy_chip_offset[chip] << index);
1468 while ((status = cy_readb(base_addr +
1469 (CySVRR << index))) != 0x00) {
1471 /* The purpose of the following test is to ensure that
1472 no chip can monopolize the driver. This forces the
1473 chips to be checked in a round-robin fashion (after
1474 draining each of a bunch (1000) of characters).
1476 if (1000 < too_many++) {
1479 cyy_intr_chip(cinfo, chip, base_addr, status,
1485 /* clear interrupts */
1486 spin_lock(&cinfo->card_lock);
1487 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1488 /* Cy_ClrIntr is 0x1800 */
1489 spin_unlock(&cinfo->card_lock);
1491 } /* cyy_interrupt */
1493 /***********************************************************/
1494 /********* End of block of Cyclom-Y specific code **********/
1495 /******** Start of block of Cyclades-Z specific code *********/
1496 /***********************************************************/
1499 cyz_fetch_msg(struct cyclades_card *cinfo,
1500 uclong * channel, ucchar * cmd, uclong * param)
1502 struct FIRM_ID __iomem *firm_id;
1503 struct ZFW_CTRL __iomem *zfw_ctrl;
1504 struct BOARD_CTRL __iomem *board_ctrl;
1505 unsigned long loc_doorbell;
1507 firm_id = cinfo->base_addr + ID_ADDRESS;
1508 if (!ISZLOADED(*cinfo)) {
1511 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1513 board_ctrl = &zfw_ctrl->board_ctrl;
1515 loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1516 (cinfo->ctl_addr))->loc_doorbell);
1518 *cmd = (char)(0xff & loc_doorbell);
1519 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1520 *param = (uclong) cy_readl(&board_ctrl->fwcmd_param);
1521 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1522 loc_doorbell, 0xffffffff);
1526 } /* cyz_fetch_msg */
1529 cyz_issue_cmd(struct cyclades_card *cinfo,
1530 uclong channel, ucchar cmd, uclong param)
1532 struct FIRM_ID __iomem *firm_id;
1533 struct ZFW_CTRL __iomem *zfw_ctrl;
1534 struct BOARD_CTRL __iomem *board_ctrl;
1535 unsigned long __iomem *pci_doorbell;
1538 firm_id = cinfo->base_addr + ID_ADDRESS;
1539 if (!ISZLOADED(*cinfo)) {
1542 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1544 board_ctrl = &zfw_ctrl->board_ctrl;
1548 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1549 while ((cy_readl(pci_doorbell) & 0xff) != 0) {
1550 if (index++ == 1000) {
1551 return (int)(cy_readl(pci_doorbell) & 0xff);
1555 cy_writel(&board_ctrl->hcmd_channel, channel);
1556 cy_writel(&board_ctrl->hcmd_param, param);
1557 cy_writel(pci_doorbell, (long)cmd);
1560 } /* cyz_issue_cmd */
1563 cyz_handle_rx(struct cyclades_port *info,
1564 volatile struct CH_CTRL __iomem * ch_ctrl,
1565 volatile struct BUF_CTRL __iomem * buf_ctrl)
1567 struct cyclades_card *cinfo = &cy_card[info->card];
1568 struct tty_struct *tty = info->tty;
1569 volatile int char_count;
1576 volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1578 rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1579 rx_put = cy_readl(&buf_ctrl->rx_put);
1580 rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1581 rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1582 if (rx_put >= rx_get)
1583 char_count = rx_put - rx_get;
1585 char_count = rx_put - rx_get + rx_bufsize;
1588 info->last_active = jiffies;
1589 info->jiffies[1] = jiffies;
1591 #ifdef CY_ENABLE_MONITORING
1592 info->mon.int_count++;
1593 info->mon.char_count += char_count;
1594 if (char_count > info->mon.char_max)
1595 info->mon.char_max = char_count;
1596 info->mon.char_last = char_count;
1599 /* flush received characters */
1600 new_rx_get = (new_rx_get + char_count) &
1602 info->rflush_count++;
1605 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1606 for performance, but because of buffer boundaries, there
1607 may be several steps to the operation */
1608 while (0 < (small_count = min_t(unsigned int,
1609 rx_bufsize - new_rx_get,
1610 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1611 tty->flip.count, char_count)))){
1612 memcpy_fromio(tty->flip.char_buf_ptr,
1613 (char *)(cinfo->base_addr + rx_bufaddr +
1617 tty->flip.char_buf_ptr += small_count;
1618 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1620 tty->flip.flag_buf_ptr += small_count;
1621 new_rx_get = (new_rx_get + small_count) &
1623 char_count -= small_count;
1624 info->icount.rx += small_count;
1625 info->idle_stats.recv_bytes += small_count;
1626 tty->flip.count += small_count;
1629 len = tty_buffer_request_room(tty, char_count);
1631 data = cy_readb(cinfo->base_addr + rx_bufaddr +
1633 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1634 tty_insert_flip_char(tty, data, TTY_NORMAL);
1635 info->idle_stats.recv_bytes++;
1639 #ifdef CONFIG_CYZ_INTR
1640 /* Recalculate the number of chars in the RX buffer and issue
1641 a cmd in case it's higher than the RX high water mark */
1642 rx_put = cy_readl(&buf_ctrl->rx_put);
1643 if (rx_put >= rx_get)
1644 char_count = rx_put - rx_get;
1646 char_count = rx_put - rx_get + rx_bufsize;
1647 if (char_count >= (int)cy_readl(&buf_ctrl->
1649 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1652 info->idle_stats.recv_idle = jiffies;
1653 tty_schedule_flip(tty);
1656 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1661 cyz_handle_tx(struct cyclades_port *info,
1662 volatile struct CH_CTRL __iomem * ch_ctrl,
1663 volatile struct BUF_CTRL __iomem * buf_ctrl)
1665 struct cyclades_card *cinfo = &cy_card[info->card];
1666 struct tty_struct *tty = info->tty;
1668 volatile int char_count;
1672 volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
1674 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1677 tx_get = cy_readl(&buf_ctrl->tx_get);
1678 tx_put = cy_readl(&buf_ctrl->tx_put);
1679 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1680 tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1681 if (tx_put >= tx_get)
1682 char_count = tx_get - tx_put - 1 + tx_bufsize;
1684 char_count = tx_get - tx_put - 1;
1692 if (info->x_char) { /* send special char */
1693 data = info->x_char;
1695 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1696 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1700 info->last_active = jiffies;
1701 info->jiffies[2] = jiffies;
1704 while (0 < (small_count = min_t(unsigned int,
1705 tx_bufsize - tx_put, min_t(unsigned int,
1706 (SERIAL_XMIT_SIZE - info->xmit_tail),
1707 min_t(unsigned int, info->xmit_cnt,
1710 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1712 &info->xmit_buf[info->xmit_tail],
1715 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1716 char_count -= small_count;
1717 info->icount.tx += small_count;
1718 info->xmit_cnt -= small_count;
1719 info->xmit_tail = (info->xmit_tail + small_count) &
1720 (SERIAL_XMIT_SIZE - 1);
1721 info->last_active = jiffies;
1722 info->jiffies[2] = jiffies;
1725 while (info->xmit_cnt && char_count) {
1726 data = info->xmit_buf[info->xmit_tail];
1728 info->xmit_tail = (info->xmit_tail + 1) &
1729 (SERIAL_XMIT_SIZE - 1);
1731 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1732 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1735 info->last_active = jiffies;
1736 info->jiffies[2] = jiffies;
1740 if (info->xmit_cnt < WAKEUP_CHARS) {
1741 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1744 cy_writel(&buf_ctrl->tx_put, tx_put);
1748 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1750 struct tty_struct *tty;
1751 struct cyclades_port *info;
1752 static volatile struct FIRM_ID __iomem *firm_id;
1753 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1754 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1755 static volatile struct CH_CTRL __iomem *ch_ctrl;
1756 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1760 uclong hw_ver, fw_ver;
1764 firm_id = cinfo->base_addr + ID_ADDRESS;
1765 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1767 board_ctrl = &zfw_ctrl->board_ctrl;
1768 fw_ver = cy_readl(&board_ctrl->fw_version);
1769 hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1772 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1775 info = &cy_port[channel + cinfo->first_line];
1776 if ((tty = info->tty) == 0) {
1779 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1780 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1784 tty_insert_flip_char(tty, 0, TTY_PARITY);
1789 tty_insert_flip_char(tty, 0, TTY_FRAME);
1794 tty_insert_flip_char(tty, 0, TTY_BREAK);
1801 if (info->flags & ASYNC_CHECK_CD) {
1802 if ((fw_ver > 241 ? ((u_long) param) :
1803 cy_readl(&ch_ctrl->rs_status)) &
1805 cy_sched_event(info,
1806 Cy_EVENT_OPEN_WAKEUP);
1808 cy_sched_event(info, Cy_EVENT_HANGUP);
1826 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1829 #ifdef CONFIG_CYZ_INTR
1833 /* Reception Interrupt */
1834 #ifdef CY_DEBUG_INTERRUPTS
1835 printk("cyz_interrupt: rcvd intr, card %d, "
1836 "port %ld\n\r", info->card, channel);
1838 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1843 /* Transmission Interrupt */
1844 #ifdef CY_DEBUG_INTERRUPTS
1845 printk("cyz_interrupt: xmit intr, card %d, "
1846 "port %ld\n\r", info->card, channel);
1848 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1850 #endif /* CONFIG_CYZ_INTR */
1852 /* should do something with this !!! */
1858 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1860 tty_schedule_flip(tty);
1864 #ifdef CONFIG_CYZ_INTR
1865 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1867 struct cyclades_card *cinfo;
1869 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1870 #ifdef CY_DEBUG_INTERRUPTS
1871 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1873 return IRQ_NONE; /* spurious interrupt */
1876 if (!ISZLOADED(*cinfo)) {
1877 #ifdef CY_DEBUG_INTERRUPTS
1878 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1883 /* Handle the interrupts */
1884 cyz_handle_cmd(cinfo);
1887 } /* cyz_interrupt */
1889 static void cyz_rx_restart(unsigned long arg)
1891 struct cyclades_port *info = (struct cyclades_port *)arg;
1893 int card = info->card;
1894 uclong channel = (info->line) - (cy_card[card].first_line);
1895 unsigned long flags;
1897 CY_LOCK(info, flags);
1898 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1900 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1901 info->line, retval);
1903 cyz_rx_full_timer[info->line].function = NULL;
1904 CY_UNLOCK(info, flags);
1907 #else /* CONFIG_CYZ_INTR */
1909 static void cyz_poll(unsigned long arg)
1911 struct cyclades_card *cinfo;
1912 struct cyclades_port *info;
1913 struct tty_struct *tty;
1914 static volatile struct FIRM_ID *firm_id;
1915 static volatile struct ZFW_CTRL *zfw_ctrl;
1916 static volatile struct BOARD_CTRL *board_ctrl;
1917 static volatile struct CH_CTRL *ch_ctrl;
1918 static volatile struct BUF_CTRL *buf_ctrl;
1921 cyz_timerlist.expires = jiffies + (HZ);
1922 for (card = 0; card < NR_CARDS; card++) {
1923 cinfo = &cy_card[card];
1925 if (!IS_CYC_Z(*cinfo))
1927 if (!ISZLOADED(*cinfo))
1930 firm_id = cinfo->base_addr + ID_ADDRESS;
1931 zfw_ctrl = cinfo->base_addr +
1932 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1933 board_ctrl = &(zfw_ctrl->board_ctrl);
1935 /* Skip first polling cycle to avoid racing conditions with the FW */
1936 if (!cinfo->intr_enabled) {
1937 cinfo->nports = (int)cy_readl(&board_ctrl->n_channel);
1938 cinfo->intr_enabled = 1;
1942 cyz_handle_cmd(cinfo);
1944 for (port = 0; port < cinfo->nports; port++) {
1945 info = &cy_port[port + cinfo->first_line];
1947 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1948 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1950 if (!info->throttle)
1951 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1952 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1954 /* poll every 'cyz_polling_cycle' period */
1955 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1957 add_timer(&cyz_timerlist);
1960 #endif /* CONFIG_CYZ_INTR */
1962 /********** End of block of Cyclades-Z specific code *********/
1963 /***********************************************************/
1965 /* This is called whenever a port becomes active;
1966 interrupts are enabled and DTR & RTS are turned on.
1968 static int startup(struct cyclades_port *info)
1970 unsigned long flags;
1972 void __iomem *base_addr;
1973 int card, chip, channel, index;
1977 channel = (info->line) - (cy_card[card].first_line);
1979 page = get_zeroed_page(GFP_KERNEL);
1983 CY_LOCK(info, flags);
1985 if (info->flags & ASYNC_INITIALIZED) {
1992 set_bit(TTY_IO_ERROR, &info->tty->flags);
2001 info->xmit_buf = (unsigned char *)page;
2003 CY_UNLOCK(info, flags);
2005 set_line_char(info);
2007 if (!IS_CYC_Z(cy_card[card])) {
2008 chip = channel >> 2;
2010 index = cy_card[card].bus_index;
2011 base_addr = cy_card[card].base_addr +
2012 (cy_chip_offset[chip] << index);
2014 #ifdef CY_DEBUG_OPEN
2015 printk("cyc startup card %d, chip %d, channel %d, "
2017 card, chip, channel, (long)base_addr);
2020 CY_LOCK(info, flags);
2022 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2024 cy_writeb(base_addr + (CyRTPR << index),
2025 (info->default_timeout ? info->default_timeout : 0x02));
2026 /* 10ms rx timeout */
2028 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2031 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2032 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2033 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2036 printk("cyc:startup raising DTR\n");
2037 printk(" status: 0x%x, 0x%x\n",
2038 cy_readb(base_addr + (CyMSVR1 << index)),
2039 cy_readb(base_addr + (CyMSVR2 << index)));
2042 cy_writeb(base_addr + (CySRER << index),
2043 cy_readb(base_addr + (CySRER << index)) | CyRxData);
2044 info->flags |= ASYNC_INITIALIZED;
2047 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2049 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2050 info->breakon = info->breakoff = 0;
2051 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2052 info->idle_stats.in_use =
2053 info->idle_stats.recv_idle =
2054 info->idle_stats.xmit_idle = jiffies;
2056 CY_UNLOCK(info, flags);
2059 struct FIRM_ID __iomem *firm_id;
2060 struct ZFW_CTRL __iomem *zfw_ctrl;
2061 struct BOARD_CTRL __iomem *board_ctrl;
2062 struct CH_CTRL __iomem *ch_ctrl;
2065 base_addr = cy_card[card].base_addr;
2067 firm_id = base_addr + ID_ADDRESS;
2068 if (!ISZLOADED(cy_card[card])) {
2072 zfw_ctrl = cy_card[card].base_addr +
2073 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2074 board_ctrl = &zfw_ctrl->board_ctrl;
2075 ch_ctrl = zfw_ctrl->ch_ctrl;
2077 #ifdef CY_DEBUG_OPEN
2078 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2079 card, channel, (long)base_addr);
2082 CY_LOCK(info, flags);
2084 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2086 #ifdef CONFIG_CYZ_INTR
2087 cy_writel(&ch_ctrl[channel].intr_enable,
2088 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2089 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2091 cy_writel(&ch_ctrl[channel].intr_enable,
2092 C_IN_IOCTLW | C_IN_MDCD);
2093 #endif /* CONFIG_CYZ_INTR */
2095 #ifdef CONFIG_CYZ_INTR
2096 cy_writel(&ch_ctrl[channel].intr_enable,
2097 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2098 C_IN_RXNNDT | C_IN_MDCD);
2100 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2101 #endif /* CONFIG_CYZ_INTR */
2104 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2106 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2107 info->line, retval);
2110 /* Flush RX buffers before raising DTR and RTS */
2111 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2114 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2115 info->line, retval);
2118 /* set timeout !!! */
2119 /* set RTS and DTR !!! */
2120 cy_writel(&ch_ctrl[channel].rs_control,
2121 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2123 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2126 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2127 info->line, retval);
2130 printk("cyc:startup raising Z DTR\n");
2133 /* enable send, recv, modem !!! */
2135 info->flags |= ASYNC_INITIALIZED;
2137 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2139 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2140 info->breakon = info->breakoff = 0;
2141 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2142 info->idle_stats.in_use =
2143 info->idle_stats.recv_idle =
2144 info->idle_stats.xmit_idle = jiffies;
2146 CY_UNLOCK(info, flags);
2149 #ifdef CY_DEBUG_OPEN
2150 printk(" cyc startup done\n");
2155 CY_UNLOCK(info, flags);
2159 static void start_xmit(struct cyclades_port *info)
2161 unsigned long flags;
2162 void __iomem *base_addr;
2163 int card, chip, channel, index;
2166 channel = (info->line) - (cy_card[card].first_line);
2167 if (!IS_CYC_Z(cy_card[card])) {
2168 chip = channel >> 2;
2170 index = cy_card[card].bus_index;
2171 base_addr = cy_card[card].base_addr +
2172 (cy_chip_offset[chip] << index);
2174 CY_LOCK(info, flags);
2175 cy_writeb(base_addr + (CyCAR << index), channel);
2176 cy_writeb(base_addr + (CySRER << index),
2177 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
2178 CY_UNLOCK(info, flags);
2180 #ifdef CONFIG_CYZ_INTR
2183 CY_LOCK(info, flags);
2184 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2187 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2188 info->line, retval);
2190 CY_UNLOCK(info, flags);
2191 #else /* CONFIG_CYZ_INTR */
2192 /* Don't have to do anything at this time */
2193 #endif /* CONFIG_CYZ_INTR */
2198 * This routine shuts down a serial port; interrupts are disabled,
2199 * and DTR is dropped if the hangup on close termio flag is on.
2201 static void shutdown(struct cyclades_port *info)
2203 unsigned long flags;
2204 void __iomem *base_addr;
2205 int card, chip, channel, index;
2207 if (!(info->flags & ASYNC_INITIALIZED)) {
2212 channel = info->line - cy_card[card].first_line;
2213 if (!IS_CYC_Z(cy_card[card])) {
2214 chip = channel >> 2;
2216 index = cy_card[card].bus_index;
2217 base_addr = cy_card[card].base_addr +
2218 (cy_chip_offset[chip] << index);
2220 #ifdef CY_DEBUG_OPEN
2221 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2223 card, chip, channel, (long)base_addr);
2226 CY_LOCK(info, flags);
2228 /* Clear delta_msr_wait queue to avoid mem leaks. */
2229 wake_up_interruptible(&info->delta_msr_wait);
2231 if (info->xmit_buf) {
2232 unsigned char *temp;
2233 temp = info->xmit_buf;
2234 info->xmit_buf = NULL;
2235 free_page((unsigned long)temp);
2237 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2238 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2239 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2240 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2242 printk("cyc shutdown dropping DTR\n");
2243 printk(" status: 0x%x, 0x%x\n",
2244 cy_readb(base_addr + (CyMSVR1 << index)),
2245 cy_readb(base_addr + (CyMSVR2 << index)));
2248 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2249 /* it may be appropriate to clear _XMIT at
2250 some later date (after testing)!!! */
2253 set_bit(TTY_IO_ERROR, &info->tty->flags);
2255 info->flags &= ~ASYNC_INITIALIZED;
2256 CY_UNLOCK(info, flags);
2258 struct FIRM_ID __iomem *firm_id;
2259 struct ZFW_CTRL __iomem *zfw_ctrl;
2260 struct BOARD_CTRL __iomem *board_ctrl;
2261 struct CH_CTRL __iomem *ch_ctrl;
2264 base_addr = cy_card[card].base_addr;
2265 #ifdef CY_DEBUG_OPEN
2266 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2267 card, channel, (long)base_addr);
2270 firm_id = base_addr + ID_ADDRESS;
2271 if (!ISZLOADED(cy_card[card])) {
2275 zfw_ctrl = cy_card[card].base_addr +
2276 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2277 board_ctrl = &zfw_ctrl->board_ctrl;
2278 ch_ctrl = zfw_ctrl->ch_ctrl;
2280 CY_LOCK(info, flags);
2282 if (info->xmit_buf) {
2283 unsigned char *temp;
2284 temp = info->xmit_buf;
2285 info->xmit_buf = NULL;
2286 free_page((unsigned long)temp);
2289 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2290 cy_writel(&ch_ctrl[channel].rs_control,
2291 (uclong)(cy_readl(&ch_ctrl[channel].rs_control)&
2292 ~(C_RS_RTS | C_RS_DTR)));
2293 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2296 printk("cyc:shutdown retval on ttyC%d was %x\n",
2297 info->line, retval);
2300 printk("cyc:shutdown dropping Z DTR\n");
2305 set_bit(TTY_IO_ERROR, &info->tty->flags);
2307 info->flags &= ~ASYNC_INITIALIZED;
2309 CY_UNLOCK(info, flags);
2312 #ifdef CY_DEBUG_OPEN
2313 printk(" cyc shutdown done\n");
2318 * ------------------------------------------------------------
2319 * cy_open() and friends
2320 * ------------------------------------------------------------
2324 block_til_ready(struct tty_struct *tty, struct file *filp,
2325 struct cyclades_port *info)
2327 DECLARE_WAITQUEUE(wait, current);
2328 struct cyclades_card *cinfo;
2329 unsigned long flags;
2330 int chip, channel, index;
2332 void __iomem *base_addr;
2334 cinfo = &cy_card[info->card];
2335 channel = info->line - cinfo->first_line;
2338 * If the device is in the middle of being closed, then block
2339 * until it's done, and then try again.
2341 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2342 if (info->flags & ASYNC_CLOSING) {
2343 interruptible_sleep_on(&info->close_wait);
2345 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2349 * If non-blocking mode is set, then make the check up front
2352 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2353 info->flags |= ASYNC_NORMAL_ACTIVE;
2358 * Block waiting for the carrier detect and the line to become
2359 * free (i.e., not in use by the callout). While we are in
2360 * this loop, info->count is dropped by one, so that
2361 * cy_close() knows when to free things. We restore it upon
2362 * exit, either normal or abnormal.
2365 add_wait_queue(&info->open_wait, &wait);
2366 #ifdef CY_DEBUG_OPEN
2367 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2368 info->line, info->count);
2371 CY_LOCK(info, flags);
2372 if (!tty_hung_up_p(filp))
2374 CY_UNLOCK(info, flags);
2375 #ifdef CY_DEBUG_COUNT
2376 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2377 current->pid, info->count);
2379 info->blocked_open++;
2381 if (!IS_CYC_Z(*cinfo)) {
2382 chip = channel >> 2;
2384 index = cinfo->bus_index;
2385 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2388 CY_LOCK(info, flags);
2389 if ((tty->termios->c_cflag & CBAUD)) {
2390 cy_writeb(base_addr + (CyCAR << index),
2392 cy_writeb(base_addr + (CyMSVR1 << index),
2394 cy_writeb(base_addr + (CyMSVR2 << index),
2397 printk("cyc:block_til_ready raising DTR\n");
2398 printk(" status: 0x%x, 0x%x\n",
2399 cy_readb(base_addr +
2400 (CyMSVR1 << index)),
2401 cy_readb(base_addr +
2402 (CyMSVR2 << index)));
2405 CY_UNLOCK(info, flags);
2407 set_current_state(TASK_INTERRUPTIBLE);
2408 if (tty_hung_up_p(filp) ||
2409 !(info->flags & ASYNC_INITIALIZED)) {
2410 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2411 -EAGAIN : -ERESTARTSYS);
2415 CY_LOCK(info, flags);
2416 cy_writeb(base_addr + (CyCAR << index),
2418 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2419 (cy_readb(base_addr +
2420 (CyMSVR1 << index)) & CyDCD))) {
2421 CY_UNLOCK(info, flags);
2424 CY_UNLOCK(info, flags);
2426 if (signal_pending(current)) {
2427 retval = -ERESTARTSYS;
2430 #ifdef CY_DEBUG_OPEN
2431 printk("cyc block_til_ready blocking: ttyC%d, "
2433 info->line, info->count);
2439 struct FIRM_ID __iomem *firm_id;
2440 struct ZFW_CTRL __iomem *zfw_ctrl;
2441 struct BOARD_CTRL __iomem *board_ctrl;
2442 struct CH_CTRL __iomem *ch_ctrl;
2445 base_addr = cinfo->base_addr;
2446 firm_id = base_addr + ID_ADDRESS;
2447 if (!ISZLOADED(*cinfo)) {
2448 current->state = TASK_RUNNING;
2449 remove_wait_queue(&info->open_wait, &wait);
2453 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
2455 board_ctrl = &zfw_ctrl->board_ctrl;
2456 ch_ctrl = zfw_ctrl->ch_ctrl;
2459 if ((tty->termios->c_cflag & CBAUD)) {
2460 cy_writel(&ch_ctrl[channel].rs_control,
2461 cy_readl(&ch_ctrl[channel].
2462 rs_control) | (C_RS_RTS |
2464 retval = cyz_issue_cmd(&cy_card[info->card],
2465 channel, C_CM_IOCTLM, 0L);
2467 printk("cyc:block_til_ready retval on "
2469 info->line, retval);
2472 printk("cyc:block_til_ready raising Z DTR\n");
2476 set_current_state(TASK_INTERRUPTIBLE);
2477 if (tty_hung_up_p(filp) ||
2478 !(info->flags & ASYNC_INITIALIZED)) {
2479 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2480 -EAGAIN : -ERESTARTSYS);
2483 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2484 (cy_readl(&ch_ctrl[channel].rs_status) &
2488 if (signal_pending(current)) {
2489 retval = -ERESTARTSYS;
2492 #ifdef CY_DEBUG_OPEN
2493 printk("cyc block_til_ready blocking: ttyC%d, "
2495 info->line, info->count);
2501 current->state = TASK_RUNNING;
2502 remove_wait_queue(&info->open_wait, &wait);
2503 if (!tty_hung_up_p(filp)) {
2505 #ifdef CY_DEBUG_COUNT
2506 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2507 current->pid, info->count);
2510 info->blocked_open--;
2511 #ifdef CY_DEBUG_OPEN
2512 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2513 info->line, info->count);
2518 info->flags |= ASYNC_NORMAL_ACTIVE;
2520 } /* block_til_ready */
2523 * This routine is called whenever a serial port is opened. It
2524 * performs the serial-specific initialization for the tty structure.
2526 static int cy_open(struct tty_struct *tty, struct file *filp)
2528 struct cyclades_port *info;
2532 if ((line < 0) || (NR_PORTS <= line)) {
2535 info = &cy_port[line];
2536 if (info->line < 0) {
2540 /* If the card's firmware hasn't been loaded,
2541 treat it as absent from the system. This
2542 will make the user pay attention.
2544 if (IS_CYC_Z(cy_card[info->card])) {
2545 struct cyclades_card *cinfo = &cy_card[info->card];
2546 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2548 if (!ISZLOADED(*cinfo)) {
2549 if (((ZE_V1 == cy_readl(
2550 &((struct RUNTIME_9060 __iomem *)
2551 (cinfo->ctl_addr))->mail_box_0)) &&
2552 Z_FPGA_CHECK(*cinfo)) &&
2553 (ZFIRM_HLT == cy_readl(
2554 &firm_id->signature))) {
2555 printk("cyc:Cyclades-Z Error: you need an "
2556 "external power supply for this number "
2557 "of ports.\n\rFirmware halted.\r\n");
2559 printk("cyc:Cyclades-Z firmware not yet "
2564 #ifdef CONFIG_CYZ_INTR
2566 /* In case this Z board is operating in interrupt mode, its
2567 interrupts should be enabled as soon as the first open
2568 happens to one of its ports. */
2569 if (!cinfo->intr_enabled) {
2570 struct ZFW_CTRL __iomem *zfw_ctrl;
2571 struct BOARD_CTRL __iomem *board_ctrl;
2573 zfw_ctrl = cinfo->base_addr +
2574 (cy_readl(&firm_id->zfwctrl_addr) &
2577 board_ctrl = &zfw_ctrl->board_ctrl;
2579 /* Enable interrupts on the PLX chip */
2580 cy_writew(cinfo->ctl_addr + 0x68,
2581 cy_readw(cinfo->ctl_addr +
2583 /* Enable interrupts on the FW */
2584 retval = cyz_issue_cmd(cinfo, 0,
2587 printk("cyc:IRQ enable retval was %x\n",
2591 (int)cy_readl(&board_ctrl->n_channel);
2592 cinfo->intr_enabled = 1;
2595 #endif /* CONFIG_CYZ_INTR */
2596 /* Make sure this Z port really exists in hardware */
2597 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2600 #ifdef CY_DEBUG_OTHER
2601 printk("cyc:cy_open ttyC%d\n", info->line); /* */
2603 tty->driver_data = info;
2605 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2608 #ifdef CY_DEBUG_OPEN
2609 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2613 #ifdef CY_DEBUG_COUNT
2614 printk("cyc:cy_open (%d): incrementing count to %d\n",
2615 current->pid, info->count);
2619 * If the port is the middle of closing, bail out now
2621 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2622 if (info->flags & ASYNC_CLOSING)
2623 interruptible_sleep_on(&info->close_wait);
2624 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2628 * Start up serial port
2630 retval = startup(info);
2635 retval = block_til_ready(tty, filp, info);
2637 #ifdef CY_DEBUG_OPEN
2638 printk("cyc:cy_open returning after block_til_ready with %d\n",
2646 #ifdef CY_DEBUG_OPEN
2647 printk(" cyc:cy_open done\n");
2654 * cy_wait_until_sent() --- wait until the transmitter is empty
2656 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2658 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2659 void __iomem *base_addr;
2660 int card, chip, channel, index;
2661 unsigned long orig_jiffies;
2664 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2667 if (info->xmit_fifo_size == 0)
2668 return; /* Just in case.... */
2670 orig_jiffies = jiffies;
2672 * Set the check interval to be 1/5 of the estimated time to
2673 * send a single character, and make it at least 1. The check
2674 * interval should also be less than the timeout.
2676 * Note: we have to use pretty tight timings here to satisfy
2679 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2680 char_time = char_time / 5;
2686 char_time = min(char_time, timeout);
2688 * If the transmitter hasn't cleared in twice the approximate
2689 * amount of time to send the entire FIFO, it probably won't
2690 * ever clear. This assumes the UART isn't doing flow
2691 * control, which is currently the case. Hence, if it ever
2692 * takes longer than info->timeout, this is probably due to a
2693 * UART bug of some kind. So, we clamp the timeout parameter at
2696 if (!timeout || timeout > 2 * info->timeout)
2697 timeout = 2 * info->timeout;
2698 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2699 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2700 printk("jiff=%lu...", jiffies);
2703 channel = (info->line) - (cy_card[card].first_line);
2704 if (!IS_CYC_Z(cy_card[card])) {
2705 chip = channel >> 2;
2707 index = cy_card[card].bus_index;
2709 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
2710 while (cy_readb(base_addr + (CySRER << index)) & CyTxRdy) {
2711 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2712 printk("Not clean (jiff=%lu)...", jiffies);
2714 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2716 if (timeout && time_after(jiffies, orig_jiffies +
2721 /* Nothing to do! */
2723 /* Run one more char cycle */
2724 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2725 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2726 printk("Clean (jiff=%lu)...done\n", jiffies);
2731 * This routine is called when a particular tty device is closed.
2733 static void cy_close(struct tty_struct *tty, struct file *filp)
2735 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2736 unsigned long flags;
2738 #ifdef CY_DEBUG_OTHER
2739 printk("cyc:cy_close ttyC%d\n", info->line);
2742 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2746 CY_LOCK(info, flags);
2747 /* If the TTY is being hung up, nothing to do */
2748 if (tty_hung_up_p(filp)) {
2749 CY_UNLOCK(info, flags);
2752 #ifdef CY_DEBUG_OPEN
2753 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2755 if ((tty->count == 1) && (info->count != 1)) {
2757 * Uh, oh. tty->count is 1, which means that the tty
2758 * structure will be freed. Info->count should always
2759 * be one in these conditions. If it's greater than
2760 * one, we've got real problems, since it means the
2761 * serial port won't be shutdown.
2763 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2764 "info->count is %d\n", info->count);
2767 #ifdef CY_DEBUG_COUNT
2768 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2769 current->pid, info->count - 1);
2771 if (--info->count < 0) {
2772 #ifdef CY_DEBUG_COUNT
2773 printk("cyc:cyc_close setting count to 0\n");
2778 CY_UNLOCK(info, flags);
2781 info->flags |= ASYNC_CLOSING;
2784 * Now we wait for the transmit buffer to clear; and we notify
2785 * the line discipline to only process XON/XOFF characters.
2788 CY_UNLOCK(info, flags);
2789 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2790 tty_wait_until_sent(tty, info->closing_wait);
2792 CY_LOCK(info, flags);
2794 if (!IS_CYC_Z(cy_card[info->card])) {
2795 int channel = info->line - cy_card[info->card].first_line;
2796 int index = cy_card[info->card].bus_index;
2797 void __iomem *base_addr = cy_card[info->card].base_addr +
2798 (cy_chip_offset[channel >> 2] << index);
2799 /* Stop accepting input */
2801 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2802 cy_writeb(base_addr + (CySRER << index),
2803 cy_readb(base_addr + (CySRER << index)) & ~CyRxData);
2804 if (info->flags & ASYNC_INITIALIZED) {
2805 /* Waiting for on-board buffers to be empty before closing
2807 CY_UNLOCK(info, flags);
2808 cy_wait_until_sent(tty, info->timeout);
2809 CY_LOCK(info, flags);
2813 /* Waiting for on-board buffers to be empty before closing the port */
2814 void __iomem *base_addr = cy_card[info->card].base_addr;
2815 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2816 struct ZFW_CTRL __iomem *zfw_ctrl =
2817 base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2818 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2819 int channel = info->line - cy_card[info->card].first_line;
2822 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2823 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2826 printk("cyc:cy_close retval on ttyC%d was %x\n",
2827 info->line, retval);
2829 CY_UNLOCK(info, flags);
2830 interruptible_sleep_on(&info->shutdown_wait);
2831 CY_LOCK(info, flags);
2836 CY_UNLOCK(info, flags);
2838 if (tty->driver->flush_buffer)
2839 tty->driver->flush_buffer(tty);
2840 tty_ldisc_flush(tty);
2841 CY_LOCK(info, flags);
2846 if (info->blocked_open) {
2847 CY_UNLOCK(info, flags);
2848 if (info->close_delay) {
2849 msleep_interruptible(jiffies_to_msecs
2850 (info->close_delay));
2852 wake_up_interruptible(&info->open_wait);
2853 CY_LOCK(info, flags);
2855 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2856 wake_up_interruptible(&info->close_wait);
2858 #ifdef CY_DEBUG_OTHER
2859 printk(" cyc:cy_close done\n");
2862 CY_UNLOCK(info, flags);
2865 /* This routine gets called when tty_write has put something into
2866 * the write_queue. The characters may come from user space or
2869 * This routine will return the number of characters actually
2870 * accepted for writing.
2872 * If the port is not already transmitting stuff, start it off by
2873 * enabling interrupts. The interrupt service routine will then
2874 * ensure that the characters are sent.
2875 * If the port is already active, there is no need to kick it.
2878 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2880 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2881 unsigned long flags;
2885 printk("cyc:cy_write ttyC%d\n", info->line); /* */
2888 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2892 if (!info->xmit_buf)
2895 CY_LOCK(info, flags);
2897 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2898 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2903 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2904 info->xmit_head = (info->xmit_head + c) &
2905 (SERIAL_XMIT_SIZE - 1);
2906 info->xmit_cnt += c;
2911 CY_UNLOCK(info, flags);
2913 info->idle_stats.xmit_bytes += ret;
2914 info->idle_stats.xmit_idle = jiffies;
2916 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2923 * This routine is called by the kernel to write a single
2924 * character to the tty device. If the kernel uses this routine,
2925 * it must call the flush_chars() routine (if defined) when it is
2926 * done stuffing characters into the driver. If there is no room
2927 * in the queue, the character is ignored.
2929 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2931 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2932 unsigned long flags;
2935 printk("cyc:cy_put_char ttyC%d\n", info->line);
2938 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2941 if (!info->xmit_buf)
2944 CY_LOCK(info, flags);
2945 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2946 CY_UNLOCK(info, flags);
2950 info->xmit_buf[info->xmit_head++] = ch;
2951 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2953 info->idle_stats.xmit_bytes++;
2954 info->idle_stats.xmit_idle = jiffies;
2955 CY_UNLOCK(info, flags);
2959 * This routine is called by the kernel after it has written a
2960 * series of characters to the tty device using put_char().
2962 static void cy_flush_chars(struct tty_struct *tty)
2964 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2967 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
2970 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2973 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2978 } /* cy_flush_chars */
2981 * This routine returns the numbers of characters the tty driver
2982 * will accept for queuing to be written. This number is subject
2983 * to change as output buffers get emptied, or if the output flow
2984 * control is activated.
2986 static int cy_write_room(struct tty_struct *tty)
2988 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2992 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
2995 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2997 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
3001 } /* cy_write_room */
3003 static int cy_chars_in_buffer(struct tty_struct *tty)
3005 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3008 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
3012 channel = (info->line) - (cy_card[card].first_line);
3014 #ifdef Z_EXT_CHARS_IN_BUFFER
3015 if (!IS_CYC_Z(cy_card[card])) {
3016 #endif /* Z_EXT_CHARS_IN_BUFFER */
3018 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
3020 return info->xmit_cnt;
3021 #ifdef Z_EXT_CHARS_IN_BUFFER
3023 static volatile struct FIRM_ID *firm_id;
3024 static volatile struct ZFW_CTRL *zfw_ctrl;
3025 static volatile struct CH_CTRL *ch_ctrl;
3026 static volatile struct BUF_CTRL *buf_ctrl;
3028 volatile uclong tx_put, tx_get, tx_bufsize;
3030 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3031 zfw_ctrl = cy_card[card].base_addr +
3032 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3033 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3034 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3036 tx_get = cy_readl(&buf_ctrl->tx_get);
3037 tx_put = cy_readl(&buf_ctrl->tx_put);
3038 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
3039 if (tx_put >= tx_get)
3040 char_count = tx_put - tx_get;
3042 char_count = tx_put - tx_get + tx_bufsize;
3044 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
3046 return info->xmit_cnt + char_count;
3048 #endif /* Z_EXT_CHARS_IN_BUFFER */
3049 } /* cy_chars_in_buffer */
3052 * ------------------------------------------------------------
3053 * cy_ioctl() and friends
3054 * ------------------------------------------------------------
3057 static void cyy_baud_calc(struct cyclades_port *info, uclong baud)
3059 int co, co_val, bpr;
3060 uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3064 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3068 /* determine which prescaler to use */
3069 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3070 if (cy_clock / co_val / baud > 63)
3074 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3078 info->tbpr = info->rbpr = bpr;
3079 info->tco = info->rco = co;
3083 * This routine finds or computes the various line characteristics.
3084 * It used to be called config_setup
3086 static void set_line_char(struct cyclades_port *info)
3088 unsigned long flags;
3089 void __iomem *base_addr;
3090 int card, chip, channel, index;
3091 unsigned cflag, iflag;
3092 unsigned short chip_number;
3093 int baud, baud_rate = 0;
3096 if (!info->tty || !info->tty->termios) {
3099 if (info->line == -1) {
3102 cflag = info->tty->termios->c_cflag;
3103 iflag = info->tty->termios->c_iflag;
3106 * Set up the tty->alt_speed kludge
3109 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3110 info->tty->alt_speed = 57600;
3111 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3112 info->tty->alt_speed = 115200;
3113 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3114 info->tty->alt_speed = 230400;
3115 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3116 info->tty->alt_speed = 460800;
3120 channel = (info->line) - (cy_card[card].first_line);
3121 chip_number = channel / 4;
3123 if (!IS_CYC_Z(cy_card[card])) {
3125 index = cy_card[card].bus_index;
3128 baud = tty_get_baud_rate(info->tty);
3129 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3131 if (info->custom_divisor)
3132 baud_rate = info->baud / info->custom_divisor;
3134 baud_rate = info->baud;
3135 } else if (baud > CD1400_MAX_SPEED) {
3136 baud = CD1400_MAX_SPEED;
3138 /* find the baud index */
3139 for (i = 0; i < 20; i++) {
3140 if (baud == baud_table[i]) {
3145 i = 19; /* CD1400_MAX_SPEED */
3148 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3150 cyy_baud_calc(info, baud_rate);
3152 if (info->chip_rev >= CD1400_REV_J) {
3153 /* It is a CD1400 rev. J or later */
3154 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3155 info->tco = baud_co_60[i]; /* Tx CO */
3156 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3157 info->rco = baud_co_60[i]; /* Rx CO */
3159 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3160 info->tco = baud_co_25[i]; /* Tx CO */
3161 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3162 info->rco = baud_co_25[i]; /* Rx CO */
3165 if (baud_table[i] == 134) {
3166 /* get it right for 134.5 baud */
3167 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3169 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3171 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3173 } else if (baud_table[i]) {
3174 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3176 /* this needs to be propagated into the card info */
3180 /* By tradition (is it a standard?) a baud rate of zero
3181 implies the line should be/has been closed. A bit
3182 later in this routine such a test is performed. */
3184 /* byte size and parity */
3187 /* receive threshold */
3188 info->cor3 = (info->default_threshold ?
3189 info->default_threshold : baud_cor3[i]);
3191 switch (cflag & CSIZE) {
3193 info->cor1 = Cy_5_BITS;
3196 info->cor1 = Cy_6_BITS;
3199 info->cor1 = Cy_7_BITS;
3202 info->cor1 = Cy_8_BITS;
3205 if (cflag & CSTOPB) {
3206 info->cor1 |= Cy_2_STOP;
3208 if (cflag & PARENB) {
3209 if (cflag & PARODD) {
3210 info->cor1 |= CyPARITY_O;
3212 info->cor1 |= CyPARITY_E;
3215 info->cor1 |= CyPARITY_NONE;
3218 /* CTS flow control flag */
3219 if (cflag & CRTSCTS) {
3220 info->flags |= ASYNC_CTS_FLOW;
3221 info->cor2 |= CyCtsAE;
3223 info->flags &= ~ASYNC_CTS_FLOW;
3224 info->cor2 &= ~CyCtsAE;
3227 info->flags &= ~ASYNC_CHECK_CD;
3229 info->flags |= ASYNC_CHECK_CD;
3231 /***********************************************
3232 The hardware option, CyRtsAO, presents RTS when
3233 the chip has characters to send. Since most modems
3234 use RTS as reverse (inbound) flow control, this
3235 option is not used. If inbound flow control is
3236 necessary, DTR can be programmed to provide the
3237 appropriate signals for use with a non-standard
3238 cable. Contact Marcio Saito for details.
3239 ***********************************************/
3241 chip = channel >> 2;
3243 base_addr = cy_card[card].base_addr +
3244 (cy_chip_offset[chip] << index);
3246 CY_LOCK(info, flags);
3247 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3249 /* tx and rx baud rate */
3251 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3252 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3253 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3254 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3256 /* set line characteristics according configuration */
3258 cy_writeb(base_addr + (CySCHR1 << index),
3259 START_CHAR(info->tty));
3260 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3261 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3262 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3263 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3264 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3265 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3267 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3270 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3271 cy_writeb(base_addr + (CyRTPR << index),
3272 (info->default_timeout ? info->default_timeout : 0x02));
3273 /* 10ms rx timeout */
3275 if (C_CLOCAL(info->tty)) {
3276 /* without modem intr */
3277 cy_writeb(base_addr + (CySRER << index),
3278 cy_readb(base_addr +
3279 (CySRER << index)) | CyMdmCh);
3280 /* act on 1->0 modem transitions */
3281 if ((cflag & CRTSCTS) && info->rflow) {
3282 cy_writeb(base_addr + (CyMCOR1 << index),
3283 (CyCTS | rflow_thr[i]));
3285 cy_writeb(base_addr + (CyMCOR1 << index),
3288 /* act on 0->1 modem transitions */
3289 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3291 /* without modem intr */
3292 cy_writeb(base_addr + (CySRER << index),
3293 cy_readb(base_addr +
3294 (CySRER << index)) | CyMdmCh);
3295 /* act on 1->0 modem transitions */
3296 if ((cflag & CRTSCTS) && info->rflow) {
3297 cy_writeb(base_addr + (CyMCOR1 << index),
3298 (CyDSR | CyCTS | CyRI | CyDCD |
3301 cy_writeb(base_addr + (CyMCOR1 << index),
3302 CyDSR | CyCTS | CyRI | CyDCD);
3304 /* act on 0->1 modem transitions */
3305 cy_writeb(base_addr + (CyMCOR2 << index),
3306 CyDSR | CyCTS | CyRI | CyDCD);
3309 if (i == 0) { /* baud rate is zero, turn off line */
3310 if (info->rtsdtr_inv) {
3311 cy_writeb(base_addr + (CyMSVR1 << index),
3314 cy_writeb(base_addr + (CyMSVR2 << index),
3318 printk("cyc:set_line_char dropping DTR\n");
3319 printk(" status: 0x%x, 0x%x\n",
3320 cy_readb(base_addr + (CyMSVR1 << index)),
3321 cy_readb(base_addr + (CyMSVR2 << index)));
3324 if (info->rtsdtr_inv) {
3325 cy_writeb(base_addr + (CyMSVR1 << index),
3328 cy_writeb(base_addr + (CyMSVR2 << index),
3332 printk("cyc:set_line_char raising DTR\n");
3333 printk(" status: 0x%x, 0x%x\n",
3334 cy_readb(base_addr + (CyMSVR1 << index)),
3335 cy_readb(base_addr + (CyMSVR2 << index)));
3340 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3342 CY_UNLOCK(info, flags);
3345 struct FIRM_ID __iomem *firm_id;
3346 struct ZFW_CTRL __iomem *zfw_ctrl;
3347 struct BOARD_CTRL __iomem *board_ctrl;
3348 struct CH_CTRL __iomem *ch_ctrl;
3349 struct BUF_CTRL __iomem *buf_ctrl;
3353 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3354 if (!ISZLOADED(cy_card[card])) {
3358 zfw_ctrl = cy_card[card].base_addr +
3359 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3360 board_ctrl = &zfw_ctrl->board_ctrl;
3361 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3362 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3365 baud = tty_get_baud_rate(info->tty);
3366 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3368 if (info->custom_divisor)
3369 baud_rate = info->baud / info->custom_divisor;
3371 baud_rate = info->baud;
3372 } else if (baud > CYZ_MAX_SPEED) {
3373 baud = CYZ_MAX_SPEED;
3375 cy_writel(&ch_ctrl->comm_baud, baud);
3378 /* get it right for 134.5 baud */
3379 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3381 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3383 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3386 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3388 /* this needs to be propagated into the card info */
3393 /* byte size and parity */
3394 switch (cflag & CSIZE) {
3396 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3399 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3402 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3405 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3408 if (cflag & CSTOPB) {
3409 cy_writel(&ch_ctrl->comm_data_l,
3410 cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3412 cy_writel(&ch_ctrl->comm_data_l,
3413 cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3415 if (cflag & PARENB) {
3416 if (cflag & PARODD) {
3417 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3419 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3422 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3425 /* CTS flow control flag */
3426 if (cflag & CRTSCTS) {
3427 cy_writel(&ch_ctrl->hw_flow,
3429 hw_flow) | C_RS_CTS | C_RS_RTS);
3431 cy_writel(&ch_ctrl->hw_flow,
3433 hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3435 /* As the HW flow control is done in firmware, the driver
3436 doesn't need to care about it */
3437 info->flags &= ~ASYNC_CTS_FLOW;
3439 /* XON/XOFF/XANY flow control flags */
3442 sw_flow |= C_FL_OXX;
3444 sw_flow |= C_FL_OIXANY;
3446 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3448 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3450 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3451 info->line, retval);
3454 /* CD sensitivity */
3455 if (cflag & CLOCAL) {
3456 info->flags &= ~ASYNC_CHECK_CD;
3458 info->flags |= ASYNC_CHECK_CD;
3461 if (baud == 0) { /* baud rate is zero, turn off line */
3462 cy_writel(&ch_ctrl->rs_control,
3463 cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3465 printk("cyc:set_line_char dropping Z DTR\n");
3468 cy_writel(&ch_ctrl->rs_control,
3469 cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
3471 printk("cyc:set_line_char raising Z DTR\n");
3475 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3477 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3478 info->line, retval);
3482 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3485 } /* set_line_char */
3488 get_serial_info(struct cyclades_port *info,
3489 struct serial_struct __user * retinfo)
3491 struct serial_struct tmp;
3492 struct cyclades_card *cinfo = &cy_card[info->card];
3496 memset(&tmp, 0, sizeof(tmp));
3497 tmp.type = info->type;
3498 tmp.line = info->line;
3499 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3500 tmp.irq = cinfo->irq;
3501 tmp.flags = info->flags;
3502 tmp.close_delay = info->close_delay;
3503 tmp.baud_base = info->baud;
3504 tmp.custom_divisor = info->custom_divisor;
3505 tmp.hub6 = 0; /*!!! */
3506 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3507 } /* get_serial_info */
3510 set_serial_info(struct cyclades_port *info,
3511 struct serial_struct __user * new_info)
3513 struct serial_struct new_serial;
3514 struct cyclades_port old_info;
3516 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3520 if (!capable(CAP_SYS_ADMIN)) {
3521 if (new_serial.close_delay != info->close_delay ||
3522 new_serial.baud_base != info->baud ||
3523 (new_serial.flags & ASYNC_FLAGS &
3525 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3527 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3528 (new_serial.flags & ASYNC_USR_MASK);
3529 info->baud = new_serial.baud_base;
3530 info->custom_divisor = new_serial.custom_divisor;
3531 goto check_and_exit;
3535 * OK, past this point, all the error checking has been done.
3536 * At this point, we start making changes.....
3539 info->baud = new_serial.baud_base;
3540 info->custom_divisor = new_serial.custom_divisor;
3541 info->flags = (info->flags & ~ASYNC_FLAGS) |
3542 (new_serial.flags & ASYNC_FLAGS);
3543 info->close_delay = new_serial.close_delay * HZ / 100;
3544 info->closing_wait = new_serial.closing_wait * HZ / 100;
3547 if (info->flags & ASYNC_INITIALIZED) {
3548 set_line_char(info);
3551 return startup(info);
3553 } /* set_serial_info */
3556 * get_lsr_info - get line status register info
3558 * Purpose: Let user call ioctl() to get info when the UART physically
3559 * is emptied. On bus types like RS485, the transmitter must
3560 * release the bus after transmitting. This must be done when
3561 * the transmit shift register is empty, not be done when the
3562 * transmit holding register is empty. This functionality
3563 * allows an RS485 driver to be written in user space.
3565 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3567 int card, chip, channel, index;
3568 unsigned char status;
3569 unsigned int result;
3570 unsigned long flags;
3571 void __iomem *base_addr;
3574 channel = (info->line) - (cy_card[card].first_line);
3575 if (!IS_CYC_Z(cy_card[card])) {
3576 chip = channel >> 2;
3578 index = cy_card[card].bus_index;
3580 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3582 CY_LOCK(info, flags);
3583 status = cy_readb(base_addr + (CySRER << index)) &
3584 (CyTxRdy | CyTxMpty);
3585 CY_UNLOCK(info, flags);
3586 result = (status ? 0 : TIOCSER_TEMT);
3588 /* Not supported yet */
3591 return put_user(result, (unsigned long __user *)value);
3594 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3596 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3597 int card, chip, channel, index;
3598 void __iomem *base_addr;
3599 unsigned long flags;
3600 unsigned char status;
3601 unsigned long lstatus;
3602 unsigned int result;
3603 struct FIRM_ID __iomem *firm_id;
3604 struct ZFW_CTRL __iomem *zfw_ctrl;
3605 struct BOARD_CTRL __iomem *board_ctrl;
3606 struct CH_CTRL __iomem *ch_ctrl;
3608 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3612 channel = (info->line) - (cy_card[card].first_line);
3613 if (!IS_CYC_Z(cy_card[card])) {
3614 chip = channel >> 2;
3616 index = cy_card[card].bus_index;
3618 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3620 CY_LOCK(info, flags);
3621 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3622 status = cy_readb(base_addr + (CyMSVR1 << index));
3623 status |= cy_readb(base_addr + (CyMSVR2 << index));
3624 CY_UNLOCK(info, flags);
3626 if (info->rtsdtr_inv) {
3627 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3628 ((status & CyDTR) ? TIOCM_RTS : 0);
3630 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3631 ((status & CyDTR) ? TIOCM_DTR : 0);
3633 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3634 ((status & CyRI) ? TIOCM_RNG : 0) |
3635 ((status & CyDSR) ? TIOCM_DSR : 0) |
3636 ((status & CyCTS) ? TIOCM_CTS : 0);
3638 base_addr = cy_card[card].base_addr;
3640 if (cy_card[card].num_chips != -1) {
3644 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3645 if (ISZLOADED(cy_card[card])) {
3646 zfw_ctrl = cy_card[card].base_addr +
3647 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3648 board_ctrl = &zfw_ctrl->board_ctrl;
3649 ch_ctrl = zfw_ctrl->ch_ctrl;
3650 lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3651 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3652 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3653 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3654 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3655 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3656 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3667 cy_tiocmset(struct tty_struct *tty, struct file *file,
3668 unsigned int set, unsigned int clear)
3670 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3671 int card, chip, channel, index;
3672 void __iomem *base_addr;
3673 unsigned long flags;
3674 struct FIRM_ID __iomem *firm_id;
3675 struct ZFW_CTRL __iomem *zfw_ctrl;
3676 struct BOARD_CTRL __iomem *board_ctrl;
3677 struct CH_CTRL __iomem *ch_ctrl;
3680 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3684 channel = (info->line) - (cy_card[card].first_line);
3685 if (!IS_CYC_Z(cy_card[card])) {
3686 chip = channel >> 2;
3688 index = cy_card[card].bus_index;
3690 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3692 if (set & TIOCM_RTS) {
3693 CY_LOCK(info, flags);
3694 cy_writeb(base_addr + (CyCAR << index),
3696 if (info->rtsdtr_inv) {
3697 cy_writeb(base_addr + (CyMSVR2 << index),
3700 cy_writeb(base_addr + (CyMSVR1 << index),
3703 CY_UNLOCK(info, flags);
3705 if (clear & TIOCM_RTS) {
3706 CY_LOCK(info, flags);
3707 cy_writeb(base_addr + (CyCAR << index),
3709 if (info->rtsdtr_inv) {
3710 cy_writeb(base_addr + (CyMSVR2 << index),
3713 cy_writeb(base_addr + (CyMSVR1 << index),
3716 CY_UNLOCK(info, flags);
3718 if (set & TIOCM_DTR) {
3719 CY_LOCK(info, flags);
3720 cy_writeb(base_addr + (CyCAR << index),
3722 if (info->rtsdtr_inv) {
3723 cy_writeb(base_addr + (CyMSVR1 << index),
3726 cy_writeb(base_addr + (CyMSVR2 << index),
3730 printk("cyc:set_modem_info raising DTR\n");
3731 printk(" status: 0x%x, 0x%x\n",
3732 cy_readb(base_addr + (CyMSVR1 << index)),
3733 cy_readb(base_addr + (CyMSVR2 << index)));
3735 CY_UNLOCK(info, flags);
3737 if (clear & TIOCM_DTR) {
3738 CY_LOCK(info, flags);
3739 cy_writeb(base_addr + (CyCAR << index),
3741 if (info->rtsdtr_inv) {
3742 cy_writeb(base_addr + (CyMSVR1 << index),
3745 cy_writeb(base_addr + (CyMSVR2 << index),
3750 printk("cyc:set_modem_info dropping DTR\n");
3751 printk(" status: 0x%x, 0x%x\n",
3752 cy_readb(base_addr + (CyMSVR1 << index)),
3753 cy_readb(base_addr + (CyMSVR2 << index)));
3755 CY_UNLOCK(info, flags);
3758 base_addr = cy_card[card].base_addr;
3760 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3761 if (ISZLOADED(cy_card[card])) {
3762 zfw_ctrl = cy_card[card].base_addr +
3763 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3764 board_ctrl = &zfw_ctrl->board_ctrl;
3765 ch_ctrl = zfw_ctrl->ch_ctrl;
3767 if (set & TIOCM_RTS) {
3768 CY_LOCK(info, flags);
3769 cy_writel(&ch_ctrl[channel].rs_control,
3770 cy_readl(&ch_ctrl[channel].
3771 rs_control) | C_RS_RTS);
3772 CY_UNLOCK(info, flags);
3774 if (clear & TIOCM_RTS) {
3775 CY_LOCK(info, flags);
3776 cy_writel(&ch_ctrl[channel].rs_control,
3777 cy_readl(&ch_ctrl[channel].
3778 rs_control) & ~C_RS_RTS);
3779 CY_UNLOCK(info, flags);
3781 if (set & TIOCM_DTR) {
3782 CY_LOCK(info, flags);
3783 cy_writel(&ch_ctrl[channel].rs_control,
3784 cy_readl(&ch_ctrl[channel].
3785 rs_control) | C_RS_DTR);
3787 printk("cyc:set_modem_info raising Z DTR\n");
3789 CY_UNLOCK(info, flags);
3791 if (clear & TIOCM_DTR) {
3792 CY_LOCK(info, flags);
3793 cy_writel(&ch_ctrl[channel].rs_control,
3794 cy_readl(&ch_ctrl[channel].
3795 rs_control) & ~C_RS_DTR);
3797 printk("cyc:set_modem_info clearing Z DTR\n");
3799 CY_UNLOCK(info, flags);
3804 CY_LOCK(info, flags);
3805 retval = cyz_issue_cmd(&cy_card[info->card],
3806 channel, C_CM_IOCTLM, 0L);
3808 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3809 info->line, retval);
3811 CY_UNLOCK(info, flags);
3817 * cy_break() --- routine which turns the break handling on or off
3819 static void cy_break(struct tty_struct *tty, int break_state)
3821 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3822 unsigned long flags;
3824 if (serial_paranoia_check(info, tty->name, "cy_break"))
3827 CY_LOCK(info, flags);
3828 if (!IS_CYC_Z(cy_card[info->card])) {
3829 /* Let the transmit ISR take care of this (since it
3830 requires stuffing characters into the output stream).
3832 if (break_state == -1) {
3833 if (!info->breakon) {
3835 if (!info->xmit_cnt) {
3836 CY_UNLOCK(info, flags);
3838 CY_LOCK(info, flags);
3842 if (!info->breakoff) {
3844 if (!info->xmit_cnt) {
3845 CY_UNLOCK(info, flags);
3847 CY_LOCK(info, flags);
3854 if (break_state == -1) {
3855 retval = cyz_issue_cmd(&cy_card[info->card],
3856 info->line - cy_card[info->card].first_line,
3857 C_CM_SET_BREAK, 0L);
3859 printk("cyc:cy_break (set) retval on ttyC%d "
3860 "was %x\n", info->line, retval);
3863 retval = cyz_issue_cmd(&cy_card[info->card],
3864 info->line - cy_card[info->card].first_line,
3865 C_CM_CLR_BREAK, 0L);
3867 printk("cyc:cy_break (clr) retval on ttyC%d "
3868 "was %x\n", info->line, retval);
3872 CY_UNLOCK(info, flags);
3876 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3879 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3881 info->mon.int_count = 0;
3882 info->mon.char_count = 0;
3883 info->mon.char_max = 0;
3884 info->mon.char_last = 0;
3886 } /* get_mon_info */
3888 static int set_threshold(struct cyclades_port *info, unsigned long value)
3890 void __iomem *base_addr;
3891 int card, channel, chip, index;
3892 unsigned long flags;
3895 channel = info->line - cy_card[card].first_line;
3896 if (!IS_CYC_Z(cy_card[card])) {
3897 chip = channel >> 2;
3899 index = cy_card[card].bus_index;
3901 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3903 info->cor3 &= ~CyREC_FIFO;
3904 info->cor3 |= value & CyREC_FIFO;
3906 CY_LOCK(info, flags);
3907 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3908 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3909 CY_UNLOCK(info, flags);
3911 /* Nothing to do! */
3914 } /* set_threshold */
3917 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3919 void __iomem *base_addr;
3920 int card, channel, chip, index;
3924 channel = info->line - cy_card[card].first_line;
3925 if (!IS_CYC_Z(cy_card[card])) {
3926 chip = channel >> 2;
3928 index = cy_card[card].bus_index;
3930 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3932 tmp = cy_readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3933 return put_user(tmp, value);
3935 /* Nothing to do! */
3938 } /* get_threshold */
3941 set_default_threshold(struct cyclades_port *info, unsigned long value)
3943 info->default_threshold = value & 0x0f;
3945 } /* set_default_threshold */
3948 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3950 return put_user(info->default_threshold, value);
3951 } /* get_default_threshold */
3953 static int set_timeout(struct cyclades_port *info, unsigned long value)
3955 void __iomem *base_addr;
3956 int card, channel, chip, index;
3957 unsigned long flags;
3960 channel = info->line - cy_card[card].first_line;
3961 if (!IS_CYC_Z(cy_card[card])) {
3962 chip = channel >> 2;
3964 index = cy_card[card].bus_index;
3966 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3968 CY_LOCK(info, flags);
3969 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3970 CY_UNLOCK(info, flags);
3972 /* Nothing to do! */
3977 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3979 void __iomem *base_addr;
3980 int card, channel, chip, index;
3984 channel = info->line - cy_card[card].first_line;
3985 if (!IS_CYC_Z(cy_card[card])) {
3986 chip = channel >> 2;
3988 index = cy_card[card].bus_index;
3990 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3992 tmp = cy_readb(base_addr + (CyRTPR << index));
3993 return put_user(tmp, value);
3995 /* Nothing to do! */
4000 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
4002 info->default_timeout = value & 0xff;
4004 } /* set_default_timeout */
4007 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
4009 return put_user(info->default_timeout, value);
4010 } /* get_default_timeout */
4013 * This routine allows the tty driver to implement device-
4014 * specific ioctl's. If the ioctl number passed in cmd is
4015 * not recognized by the driver, it should return ENOIOCTLCMD.
4018 cy_ioctl(struct tty_struct *tty, struct file *file,
4019 unsigned int cmd, unsigned long arg)
4021 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4022 struct cyclades_icount cprev, cnow; /* kernel counter temps */
4023 struct serial_icounter_struct __user *p_cuser; /* user space */
4025 unsigned long flags;
4026 void __user *argp = (void __user *)arg;
4028 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4031 #ifdef CY_DEBUG_OTHER
4032 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
4037 ret_val = get_mon_info(info, argp);
4040 ret_val = get_threshold(info, argp);
4043 ret_val = set_threshold(info, arg);
4045 case CYGETDEFTHRESH:
4046 ret_val = get_default_threshold(info, argp);
4048 case CYSETDEFTHRESH:
4049 ret_val = set_default_threshold(info, arg);
4052 ret_val = get_timeout(info, argp);
4055 ret_val = set_timeout(info, arg);
4057 case CYGETDEFTIMEOUT:
4058 ret_val = get_default_timeout(info, argp);
4060 case CYSETDEFTIMEOUT:
4061 ret_val = set_default_timeout(info, arg);
4064 info->rflow = (int)arg;
4068 ret_val = info->rflow;
4070 case CYSETRTSDTR_INV:
4071 info->rtsdtr_inv = (int)arg;
4074 case CYGETRTSDTR_INV:
4075 ret_val = info->rtsdtr_inv;
4078 if (copy_to_user(argp, &cy_card[info->card],
4079 sizeof(struct cyclades_card))) {
4085 case CYGETCD1400VER:
4086 ret_val = info->chip_rev;
4088 #ifndef CONFIG_CYZ_INTR
4089 case CYZSETPOLLCYCLE:
4090 cyz_polling_cycle = (arg * HZ) / 1000;
4093 case CYZGETPOLLCYCLE:
4094 ret_val = (cyz_polling_cycle * 1000) / HZ;
4096 #endif /* CONFIG_CYZ_INTR */
4098 info->closing_wait = (unsigned short)arg *HZ / 100;
4102 ret_val = info->closing_wait / (HZ / 100);
4105 ret_val = get_serial_info(info, argp);
4108 ret_val = set_serial_info(info, argp);
4110 case TIOCSERGETLSR: /* Get line status register */
4111 ret_val = get_lsr_info(info, argp);
4114 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4115 * - mask passed in arg for lines of interest
4116 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4117 * Caller should use TIOCGICOUNT to see which one it was
4120 CY_LOCK(info, flags);
4121 /* note the counters on entry */
4122 cprev = info->icount;
4123 CY_UNLOCK(info, flags);
4125 interruptible_sleep_on(&info->delta_msr_wait);
4126 /* see if a signal did it */
4127 if (signal_pending(current)) {
4128 return -ERESTARTSYS;
4131 CY_LOCK(info, flags);
4132 cnow = info->icount; /* atomic copy */
4133 CY_UNLOCK(info, flags);
4135 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4136 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4137 return -EIO; /* no change => error */
4139 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4140 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4141 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4142 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4150 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4151 * Return: write counters to the user passed counter struct
4152 * NB: both 1->0 and 0->1 transitions are counted except for
4153 * RI where only 0->1 is counted.
4156 CY_LOCK(info, flags);
4157 cnow = info->icount;
4158 CY_UNLOCK(info, flags);
4160 ret_val = put_user(cnow.cts, &p_cuser->cts);
4163 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4166 ret_val = put_user(cnow.rng, &p_cuser->rng);
4169 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4172 ret_val = put_user(cnow.rx, &p_cuser->rx);
4175 ret_val = put_user(cnow.tx, &p_cuser->tx);
4178 ret_val = put_user(cnow.frame, &p_cuser->frame);
4181 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4184 ret_val = put_user(cnow.parity, &p_cuser->parity);
4187 ret_val = put_user(cnow.brk, &p_cuser->brk);
4190 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4196 ret_val = -ENOIOCTLCMD;
4199 #ifdef CY_DEBUG_OTHER
4200 printk(" cyc:cy_ioctl done\n");
4207 * This routine allows the tty driver to be notified when
4208 * device's termios settings have changed. Note that a
4209 * well-designed tty driver should be prepared to accept the case
4210 * where old == NULL, and try to do something rational.
4212 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4214 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4216 #ifdef CY_DEBUG_OTHER
4217 printk("cyc:cy_set_termios ttyC%d\n", info->line);
4220 if (tty->termios->c_cflag == old_termios->c_cflag &&
4221 (tty->termios->c_iflag & (IXON | IXANY)) ==
4222 (old_termios->c_iflag & (IXON | IXANY)))
4224 set_line_char(info);
4226 if ((old_termios->c_cflag & CRTSCTS) &&
4227 !(tty->termios->c_cflag & CRTSCTS)) {
4228 tty->hw_stopped = 0;
4233 * No need to wake up processes in open wait, since they
4234 * sample the CLOCAL flag once, and don't recheck it.
4235 * XXX It's not clear whether the current behavior is correct
4236 * or not. Hence, this may change.....
4238 if (!(old_termios->c_cflag & CLOCAL) &&
4239 (tty->termios->c_cflag & CLOCAL))
4240 wake_up_interruptible(&info->open_wait);
4242 } /* cy_set_termios */
4244 /* This function is used to send a high-priority XON/XOFF character to
4247 static void cy_send_xchar(struct tty_struct *tty, char ch)
4249 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4252 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4261 channel = info->line - cy_card[card].first_line;
4263 if (IS_CYC_Z(cy_card[card])) {
4264 if (ch == STOP_CHAR(tty))
4265 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4267 else if (ch == START_CHAR(tty))
4268 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4273 /* This routine is called by the upper-layer tty layer to signal
4274 that incoming characters should be throttled because the input
4275 buffers are close to full.
4277 static void cy_throttle(struct tty_struct *tty)
4279 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4280 unsigned long flags;
4281 void __iomem *base_addr;
4282 int card, chip, channel, index;
4284 #ifdef CY_DEBUG_THROTTLE
4287 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4288 tty->ldisc.chars_in_buffer(tty), info->line);
4291 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4298 if (!IS_CYC_Z(cy_card[card]))
4299 cy_send_xchar(tty, STOP_CHAR(tty));
4304 if (tty->termios->c_cflag & CRTSCTS) {
4305 channel = info->line - cy_card[card].first_line;
4306 if (!IS_CYC_Z(cy_card[card])) {
4307 chip = channel >> 2;
4309 index = cy_card[card].bus_index;
4310 base_addr = cy_card[card].base_addr +
4311 (cy_chip_offset[chip] << index);
4313 CY_LOCK(info, flags);
4314 cy_writeb(base_addr + (CyCAR << index),
4316 if (info->rtsdtr_inv) {
4317 cy_writeb(base_addr + (CyMSVR2 << index),
4320 cy_writeb(base_addr + (CyMSVR1 << index),
4323 CY_UNLOCK(info, flags);
4331 * This routine notifies the tty driver that it should signal
4332 * that characters can now be sent to the tty without fear of
4333 * overrunning the input buffers of the line disciplines.
4335 static void cy_unthrottle(struct tty_struct *tty)
4337 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4338 unsigned long flags;
4339 void __iomem *base_addr;
4340 int card, chip, channel, index;
4342 #ifdef CY_DEBUG_THROTTLE
4345 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4346 tty->ldisc.chars_in_buffer(tty), info->line);
4349 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4357 cy_send_xchar(tty, START_CHAR(tty));
4360 if (tty->termios->c_cflag & CRTSCTS) {
4362 channel = info->line - cy_card[card].first_line;
4363 if (!IS_CYC_Z(cy_card[card])) {
4364 chip = channel >> 2;
4366 index = cy_card[card].bus_index;
4367 base_addr = cy_card[card].base_addr +
4368 (cy_chip_offset[chip] << index);
4370 CY_LOCK(info, flags);
4371 cy_writeb(base_addr + (CyCAR << index),
4373 if (info->rtsdtr_inv) {
4374 cy_writeb(base_addr + (CyMSVR2 << index),
4377 cy_writeb(base_addr + (CyMSVR1 << index),
4380 CY_UNLOCK(info, flags);
4385 } /* cy_unthrottle */
4387 /* cy_start and cy_stop provide software output flow control as a
4388 function of XON/XOFF, software CTS, and other such stuff.
4390 static void cy_stop(struct tty_struct *tty)
4392 struct cyclades_card *cinfo;
4393 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4394 void __iomem *base_addr;
4395 int chip, channel, index;
4396 unsigned long flags;
4398 #ifdef CY_DEBUG_OTHER
4399 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
4402 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4405 cinfo = &cy_card[info->card];
4406 channel = info->line - cinfo->first_line;
4407 if (!IS_CYC_Z(*cinfo)) {
4408 index = cinfo->bus_index;
4409 chip = channel >> 2;
4411 base_addr = cy_card[info->card].base_addr +
4412 (cy_chip_offset[chip] << index);
4414 CY_LOCK(info, flags);
4415 cy_writeb(base_addr + (CyCAR << index),
4416 (u_char)(channel & 0x0003)); /* index channel */
4417 cy_writeb(base_addr + (CySRER << index),
4418 cy_readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4419 CY_UNLOCK(info, flags);
4421 /* Nothing to do! */
4425 static void cy_start(struct tty_struct *tty)
4427 struct cyclades_card *cinfo;
4428 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4429 void __iomem *base_addr;
4430 int chip, channel, index;
4431 unsigned long flags;
4433 #ifdef CY_DEBUG_OTHER
4434 printk("cyc:cy_start ttyC%d\n", info->line); /* */
4437 if (serial_paranoia_check(info, tty->name, "cy_start"))
4440 cinfo = &cy_card[info->card];
4441 channel = info->line - cinfo->first_line;
4442 index = cinfo->bus_index;
4443 if (!IS_CYC_Z(*cinfo)) {
4444 chip = channel >> 2;
4446 base_addr = cy_card[info->card].base_addr +
4447 (cy_chip_offset[chip] << index);
4449 CY_LOCK(info, flags);
4450 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4451 cy_writeb(base_addr + (CySRER << index),
4452 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
4453 CY_UNLOCK(info, flags);
4455 /* Nothing to do! */
4459 static void cy_flush_buffer(struct tty_struct *tty)
4461 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4462 int card, channel, retval;
4463 unsigned long flags;
4466 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
4469 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4473 channel = (info->line) - (cy_card[card].first_line);
4475 CY_LOCK(info, flags);
4476 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4477 CY_UNLOCK(info, flags);
4479 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4481 CY_LOCK(info, flags);
4483 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4485 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4486 info->line, retval);
4488 CY_UNLOCK(info, flags);
4491 wake_up_interruptible(&tty->write_wait);
4492 } /* cy_flush_buffer */
4495 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4497 static void cy_hangup(struct tty_struct *tty)
4499 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4501 #ifdef CY_DEBUG_OTHER
4502 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
4505 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4508 cy_flush_buffer(tty);
4512 #ifdef CY_DEBUG_COUNT
4513 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4516 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4517 wake_up_interruptible(&info->open_wait);
4521 * ---------------------------------------------------------------------
4522 * cy_init() and friends
4524 * cy_init() is called at boot-time to initialize the serial driver.
4525 * ---------------------------------------------------------------------
4528 /* initialize chips on Cyclom-Y card -- return number of valid
4529 chips (which is number of ports/4) */
4530 static unsigned short __init
4531 cyy_init_card(void __iomem * true_base_addr, int index)
4533 unsigned int chip_number;
4534 void __iomem *base_addr;
4536 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4537 /* Cy_HwReset is 0x1400 */
4538 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4539 /* Cy_ClrIntr is 0x1800 */
4542 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4544 true_base_addr + (cy_chip_offset[chip_number] << index);
4546 if (cy_readb(base_addr + (CyCCR << index)) != 0x00) {
4548 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4549 chip_number, (unsigned long)base_addr);
4554 cy_writeb(base_addr + (CyGFRCR << index), 0);
4557 /* The Cyclom-16Y does not decode address bit 9 and therefore
4558 cannot distinguish between references to chip 0 and a non-
4559 existent chip 4. If the preceding clearing of the supposed
4560 chip 4 GFRCR register appears at chip 0, there is no chip 4
4561 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4563 if (chip_number == 4 && cy_readb(true_base_addr +
4564 (cy_chip_offset[0] << index) +
4565 (CyGFRCR << index)) == 0) {
4569 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4572 if (cy_readb(base_addr + (CyGFRCR << index)) == 0x00) {
4574 printk(" chip #%d at %#6lx is not responding ",
4575 chip_number, (unsigned long)base_addr);
4576 printk("(GFRCR stayed 0)\n",
4580 if ((0xf0 & (cy_readb(base_addr + (CyGFRCR << index)))) !=
4583 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4585 chip_number, (unsigned long)base_addr,
4586 base_addr[CyGFRCR<<index]);
4590 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4591 if (cy_readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4592 /* It is a CD1400 rev. J or later */
4593 /* Impossible to reach 5ms with this chip.
4594 Changed to 2ms instead (f = 500 Hz). */
4595 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4598 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4602 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4603 chip_number, (unsigned long)base_addr,
4604 cy_readb(base_addr+(CyGFRCR<<index)));
4608 } /* cyy_init_card */
4611 * ---------------------------------------------------------------------
4612 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4613 * sets global variables and return the number of ISA boards found.
4614 * ---------------------------------------------------------------------
4616 static int __init cy_detect_isa(void)
4619 unsigned short cy_isa_irq, nboard;
4620 void __iomem *cy_isa_address;
4621 unsigned short i, j, cy_isa_nchan;
4629 /* Check for module parameters */
4630 for (i = 0; i < NR_CARDS; i++) {
4631 if (maddr[i] || i) {
4633 cy_isa_addresses[i] = maddr[i];
4640 /* scan the address table probing for Cyclom-Y/ISA boards */
4641 for (i = 0; i < NR_ISA_ADDRS; i++) {
4642 unsigned int isa_address = cy_isa_addresses[i];
4643 if (isa_address == 0x0000) {
4647 /* probe for CD1400... */
4648 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4649 cy_isa_nchan = CyPORTS_PER_CHIP *
4650 cyy_init_card(cy_isa_address, 0);
4651 if (cy_isa_nchan == 0) {
4655 if (isparam && irq[i])
4656 cy_isa_irq = irq[i];
4659 /* find out the board's irq by probing */
4660 cy_isa_irq = detect_isa_irq(cy_isa_address);
4661 if (cy_isa_irq == 0) {
4662 printk("Cyclom-Y/ISA found at 0x%lx ",
4663 (unsigned long)cy_isa_address);
4664 printk("but the IRQ could not be detected.\n");
4668 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4669 printk("Cyclom-Y/ISA found at 0x%lx ",
4670 (unsigned long)cy_isa_address);
4671 printk("but no more channels are available.\n");
4672 printk("Change NR_PORTS in cyclades.c and recompile "
4676 /* fill the next cy_card structure available */
4677 for (j = 0; j < NR_CARDS; j++) {
4678 if (cy_card[j].base_addr == 0)
4681 if (j == NR_CARDS) { /* no more cy_cards available */
4682 printk("Cyclom-Y/ISA found at 0x%lx ",
4683 (unsigned long)cy_isa_address);
4684 printk("but no more cards can be used .\n");
4685 printk("Change NR_CARDS in cyclades.c and recompile "
4691 if (request_irq(cy_isa_irq, cyy_interrupt,
4692 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4693 printk("Cyclom-Y/ISA found at 0x%lx ",
4694 (unsigned long)cy_isa_address);
4695 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
4700 cy_card[j].base_addr = cy_isa_address;
4701 cy_card[j].ctl_addr = NULL;
4702 cy_card[j].irq = (int)cy_isa_irq;
4703 cy_card[j].bus_index = 0;
4704 cy_card[j].first_line = cy_next_channel;
4705 cy_card[j].num_chips = cy_isa_nchan / 4;
4709 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4710 j + 1, (unsigned long)cy_isa_address,
4711 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4713 printk("%d channels starting from port %d.\n",
4714 cy_isa_nchan, cy_next_channel);
4715 cy_next_channel += cy_isa_nchan;
4720 #endif /* CONFIG_ISA */
4721 } /* cy_detect_isa */
4723 static void plx_init(void __iomem * addr, uclong initctl)
4726 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4728 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4730 /* Reload Config. Registers from EEPROM */
4731 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4733 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
4737 * ---------------------------------------------------------------------
4738 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4739 * sets global variables and return the number of PCI boards found.
4740 * ---------------------------------------------------------------------
4742 static int __init cy_detect_pci(void)
4746 struct pci_dev *pdev = NULL;
4747 unsigned char cyy_rev_id;
4748 unsigned char cy_pci_irq = 0;
4749 uclong cy_pci_phys0, cy_pci_phys2;
4750 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4751 unsigned short i, j, cy_pci_nchan, plx_ver;
4752 unsigned short device_id, dev_index = 0;
4755 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4756 uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4757 unsigned char Ze_irq[NR_CARDS];
4758 struct pci_dev *Ze_pdev[NR_CARDS];
4760 for (i = 0; i < NR_CARDS; i++) {
4761 /* look for a Cyclades card by vendor and device id */
4762 while ((device_id = cy_pci_dev_id[dev_index]) != 0) {
4763 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4764 device_id, pdev)) == NULL) {
4765 dev_index++; /* try next device id */
4767 break; /* found a board */
4774 if (pci_enable_device(pdev))
4777 /* read PCI configuration area */
4778 cy_pci_irq = pdev->irq;
4779 cy_pci_phys0 = pci_resource_start(pdev, 0);
4780 cy_pci_phys2 = pci_resource_start(pdev, 2);
4781 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4783 device_id &= ~PCI_DEVICE_ID_MASK;
4785 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4786 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4788 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4789 pdev->bus->number, pdev->devfn);
4790 printk("rev_id=%d) IRQ%d\n",
4791 cyy_rev_id, (int)cy_pci_irq);
4792 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4794 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4797 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4798 printk(" Warning: PCI I/O bit incorrectly "
4799 "set. Ignoring it...\n");
4800 pdev->resource[2].flags &= ~IORESOURCE_IO;
4803 /* Although we don't use this I/O region, we should
4804 request it from the kernel anyway, to avoid problems
4805 with other drivers accessing it. */
4806 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4807 printk(KERN_ERR "cyclades: failed to reserve "
4811 #if defined(__alpha__)
4812 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4813 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4814 pdev->bus->number, pdev->devfn);
4815 printk("rev_id=%d) IRQ%d\n",
4816 cyy_rev_id, (int)cy_pci_irq);
4817 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4819 (ulong)cy_pci_phys2,
4820 (ulong)cy_pci_phys0);
4821 printk("Cyclom-Y/PCI not supported for low "
4822 "addresses in Alpha systems.\n");
4827 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4828 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
4831 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
4833 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
4835 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4836 cyy_init_card(cy_pci_addr2, 1));
4837 if (cy_pci_nchan == 0) {
4838 printk("Cyclom-Y PCI host card with ");
4839 printk("no Serial-Modules at 0x%lx.\n",
4840 (ulong) cy_pci_phys2);
4844 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4845 printk("Cyclom-Y/PCI found at 0x%lx ",
4846 (ulong) cy_pci_phys2);
4847 printk("but no channels are available.\n");
4848 printk("Change NR_PORTS in cyclades.c and "
4849 "recompile kernel.\n");
4852 /* fill the next cy_card structure available */
4853 for (j = 0; j < NR_CARDS; j++) {
4854 if (cy_card[j].base_addr == 0)
4857 if (j == NR_CARDS) { /* no more cy_cards available */
4858 printk("Cyclom-Y/PCI found at 0x%lx ",
4859 (ulong) cy_pci_phys2);
4860 printk("but no more cards can be used.\n");
4861 printk("Change NR_CARDS in cyclades.c and "
4862 "recompile kernel.\n");
4867 if (request_irq(cy_pci_irq, cyy_interrupt,
4868 IRQF_SHARED, "Cyclom-Y", &cy_card[j])) {
4869 printk("Cyclom-Y/PCI found at 0x%lx ",
4870 (ulong) cy_pci_phys2);
4871 printk("but could not allocate IRQ%d.\n",
4877 cy_card[j].base_phys = (ulong) cy_pci_phys2;
4878 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
4879 cy_card[j].base_addr = cy_pci_addr2;
4880 cy_card[j].ctl_addr = cy_pci_addr0;
4881 cy_card[j].irq = (int)cy_pci_irq;
4882 cy_card[j].bus_index = 1;
4883 cy_card[j].first_line = cy_next_channel;
4884 cy_card[j].num_chips = cy_pci_nchan / 4;
4885 cy_card[j].pdev = pdev;
4887 /* enable interrupts in the PCI interface */
4888 plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4892 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4897 default: /* Old boards, use PLX_9060 */
4899 plx_init(cy_pci_addr0, 0x6c);
4900 /* For some yet unknown reason, once the PLX9060 reloads
4901 the EEPROM, the IRQ is lost and, thus, we have to
4902 re-write it to the PCI config. registers.
4903 This will remain here until we find a permanent
4905 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4908 cy_writew(cy_pci_addr0 + 0x68,
4909 cy_readw(cy_pci_addr0 +
4915 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4916 j + 1, (ulong)cy_pci_phys2,
4917 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
4919 printk("%d channels starting from port %d.\n",
4920 cy_pci_nchan, cy_next_channel);
4922 cy_next_channel += cy_pci_nchan;
4923 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4925 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4926 pdev->bus->number, pdev->devfn);
4927 printk("rev_id=%d) IRQ%d\n",
4928 cyy_rev_id, (int)cy_pci_irq);
4929 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4931 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4932 printk("Cyclades-Z/PCI not supported for low "
4935 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4937 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4938 pdev->bus->number, pdev->devfn);
4939 printk("rev_id=%d) IRQ%d\n",
4940 cyy_rev_id, (int)cy_pci_irq);
4941 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4943 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
4945 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4947 /* Disable interrupts on the PLX before resetting it */
4948 cy_writew(cy_pci_addr0 + 0x68,
4949 cy_readw(cy_pci_addr0 + 0x68) & ~0x0900);
4951 plx_init(cy_pci_addr0, 0x6c);
4952 /* For some yet unknown reason, once the PLX9060 reloads
4953 the EEPROM, the IRQ is lost and, thus, we have to
4954 re-write it to the PCI config. registers.
4955 This will remain here until we find a permanent
4957 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4961 (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
4962 cy_pci_addr0)->mail_box_0);
4964 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4965 printk(" Warning: PCI I/O bit incorrectly "
4966 "set. Ignoring it...\n");
4967 pdev->resource[2].flags &= ~IORESOURCE_IO;
4970 /* Although we don't use this I/O region, we should
4971 request it from the kernel anyway, to avoid problems
4972 with other drivers accessing it. */
4973 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4974 printk(KERN_ERR "cyclades: failed to reserve "
4979 if (mailbox == ZE_V1) {
4980 cy_pci_addr2 = ioremap(cy_pci_phys2,
4982 if (ZeIndex == NR_CARDS) {
4983 printk("Cyclades-Ze/PCI found at "
4984 "0x%lx but no more cards can "
4985 "be used.\nChange NR_CARDS in "
4986 "cyclades.c and recompile "
4988 (ulong)cy_pci_phys2);
4990 Ze_phys0[ZeIndex] = cy_pci_phys0;
4991 Ze_phys2[ZeIndex] = cy_pci_phys2;
4992 Ze_addr0[ZeIndex] = cy_pci_addr0;
4993 Ze_addr2[ZeIndex] = cy_pci_addr2;
4994 Ze_irq[ZeIndex] = cy_pci_irq;
4995 Ze_pdev[ZeIndex] = pdev;
5001 cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin);
5005 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5007 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5008 if (mailbox == ZO_V1) {
5009 cy_writel(&((struct RUNTIME_9060 *)
5010 (cy_pci_addr0))->loc_addr_base,
5013 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5014 "%lx\n", (ulong) (0xff &
5015 cy_readl(&((struct CUSTOM_REG *)
5016 (cy_pci_addr2))->fpga_id)),
5018 cy_readl(&((struct CUSTOM_REG *)
5021 cy_writel(&((struct RUNTIME_9060 *)
5022 (cy_pci_addr0))->loc_addr_base,
5025 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5026 "FPGA not loaded\n");
5029 /* The following clears the firmware id word. This
5030 ensures that the driver will not attempt to talk to
5031 the board until it has been properly initialized.
5034 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5035 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5037 /* This must be a Cyclades-8Zo/PCI. The extendable
5038 version will have a different device_id and will
5039 be allocated its maximum number of ports. */
5042 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5043 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5044 "no channels are available.\nChange "
5045 "NR_PORTS in cyclades.c and recompile "
5046 "kernel.\n", (ulong)cy_pci_phys2);
5050 /* fill the next cy_card structure available */
5051 for (j = 0; j < NR_CARDS; j++) {
5052 if (cy_card[j].base_addr == 0)
5055 if (j == NR_CARDS) { /* no more cy_cards available */
5056 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5057 "no more cards can be used.\nChange "
5058 "NR_CARDS in cyclades.c and recompile "
5059 "kernel.\n", (ulong)cy_pci_phys2);
5062 #ifdef CONFIG_CYZ_INTR
5063 /* allocate IRQ only if board has an IRQ */
5064 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5065 if (request_irq(cy_pci_irq, cyz_interrupt,
5066 IRQF_SHARED, "Cyclades-Z",
5068 printk("Cyclom-8Zo/PCI found at 0x%lx "
5069 "but could not allocate "
5070 "IRQ%d.\n", (ulong)cy_pci_phys2,
5075 #endif /* CONFIG_CYZ_INTR */
5078 cy_card[j].base_phys = cy_pci_phys2;
5079 cy_card[j].ctl_phys = cy_pci_phys0;
5080 cy_card[j].base_addr = cy_pci_addr2;
5081 cy_card[j].ctl_addr = cy_pci_addr0;
5082 cy_card[j].irq = (int)cy_pci_irq;
5083 cy_card[j].bus_index = 1;
5084 cy_card[j].first_line = cy_next_channel;
5085 cy_card[j].num_chips = -1;
5086 cy_card[j].pdev = pdev;
5089 #ifdef CONFIG_CYZ_INTR
5090 /* don't report IRQ if board is no IRQ */
5091 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5092 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5093 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5094 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5097 #endif /* CONFIG_CYZ_INTR */
5098 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5099 j + 1, (ulong)cy_pci_phys2,
5100 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5102 printk("%d channels starting from port %d.\n",
5103 cy_pci_nchan, cy_next_channel);
5104 cy_next_channel += cy_pci_nchan;
5108 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5109 cy_pci_phys0 = Ze_phys0[0];
5110 cy_pci_phys2 = Ze_phys2[0];
5111 cy_pci_addr0 = Ze_addr0[0];
5112 cy_pci_addr2 = Ze_addr2[0];
5113 cy_pci_irq = Ze_irq[0];
5115 for (j = 0; j < ZeIndex - 1; j++) {
5116 Ze_phys0[j] = Ze_phys0[j + 1];
5117 Ze_phys2[j] = Ze_phys2[j + 1];
5118 Ze_addr0[j] = Ze_addr0[j + 1];
5119 Ze_addr2[j] = Ze_addr2[j + 1];
5120 Ze_irq[j] = Ze_irq[j + 1];
5121 Ze_pdev[j] = Ze_pdev[j + 1];
5124 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
5125 cy_pci_addr0)->mail_box_0);
5127 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5128 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5129 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
5133 /* This must be the new Cyclades-Ze/PCI. */
5134 cy_pci_nchan = ZE_V1_NPORTS;
5136 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5137 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
5138 "are available.\nChange NR_PORTS in cyclades.c "
5139 "and recompile kernel.\n",
5140 (ulong) cy_pci_phys2);
5144 /* fill the next cy_card structure available */
5145 for (j = 0; j < NR_CARDS; j++) {
5146 if (cy_card[j].base_addr == 0)
5149 if (j == NR_CARDS) { /* no more cy_cards available */
5150 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
5151 "cards can be used.\nChange NR_CARDS in "
5152 "cyclades.c and recompile kernel.\n",
5153 (ulong) cy_pci_phys2);
5156 #ifdef CONFIG_CYZ_INTR
5157 /* allocate IRQ only if board has an IRQ */
5158 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5159 if (request_irq(cy_pci_irq, cyz_interrupt,
5160 IRQF_SHARED, "Cyclades-Z",
5162 printk("Cyclom-Ze/PCI found at 0x%lx ",
5163 (ulong) cy_pci_phys2);
5164 printk("but could not allocate IRQ%d.\n",
5169 #endif /* CONFIG_CYZ_INTR */
5172 cy_card[j].base_phys = cy_pci_phys2;
5173 cy_card[j].ctl_phys = cy_pci_phys0;
5174 cy_card[j].base_addr = cy_pci_addr2;
5175 cy_card[j].ctl_addr = cy_pci_addr0;
5176 cy_card[j].irq = (int)cy_pci_irq;
5177 cy_card[j].bus_index = 1;
5178 cy_card[j].first_line = cy_next_channel;
5179 cy_card[j].num_chips = -1;
5180 cy_card[j].pdev = pdev;
5183 #ifdef CONFIG_CYZ_INTR
5184 /* don't report IRQ if board is no IRQ */
5185 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5186 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5187 j + 1, (ulong) cy_pci_phys2,
5188 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
5191 #endif /* CONFIG_CYZ_INTR */
5192 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5193 j + 1, (ulong) cy_pci_phys2,
5194 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
5196 printk("%d channels starting from port %d.\n",
5197 cy_pci_nchan, cy_next_channel);
5198 cy_next_channel += cy_pci_nchan;
5201 printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be "
5202 "used.\nChange NR_CARDS in cyclades.c and recompile "
5203 "kernel.\n", (unsigned int)Ze_phys2[0]);
5208 #endif /* ifdef CONFIG_PCI */
5209 } /* cy_detect_pci */
5212 * This routine prints out the appropriate serial driver version number
5213 * and identifies which options were configured into this driver.
5215 static inline void show_version(void)
5217 printk("Cyclades driver " CY_VERSION "\n");
5218 printk(" built %s %s\n", __DATE__, __TIME__);
5219 } /* show_version */
5222 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5223 int *eof, void *data)
5225 struct cyclades_port *info;
5231 __u32 cur_jifs = jiffies;
5233 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5234 "IdleIn Overruns Ldisc\n");
5239 /* Output one line for each known port */
5240 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5244 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5245 "%8lu %9lu %6ld\n", info->line,
5246 (cur_jifs - info->idle_stats.in_use) / HZ,
5247 info->idle_stats.xmit_bytes,
5248 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5249 info->idle_stats.recv_bytes,
5250 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5251 info->idle_stats.overruns,
5252 (long)info->tty->ldisc.num);
5254 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5256 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5264 if (pos > offset + length)
5269 *start = buf + (offset - begin); /* Start of wanted data */
5270 len -= (offset - begin); /* Start slop */
5272 len = length; /* Ending slop */
5278 /* The serial driver boot-time initialization code!
5279 Hardware I/O ports are mapped to character special devices on a
5280 first found, first allocated manner. That is, this code searches
5281 for Cyclom cards in the system. As each is found, it is probed
5282 to discover how many chips (and thus how many ports) are present.
5283 These ports are mapped to the tty ports 32 and upward in monotonic
5284 fashion. If an 8-port card is replaced with a 16-port card, the
5285 port mapping on a following card will shift.
5287 This approach is different from what is used in the other serial
5288 device driver because the Cyclom is more properly a multiplexer,
5289 not just an aggregation of serial ports on one card.
5291 If there are more cards with more ports than have been
5292 statically allocated above, a warning is printed and the
5293 extra ports are ignored.
5296 static const struct tty_operations cy_ops = {
5300 .put_char = cy_put_char,
5301 .flush_chars = cy_flush_chars,
5302 .write_room = cy_write_room,
5303 .chars_in_buffer = cy_chars_in_buffer,
5304 .flush_buffer = cy_flush_buffer,
5306 .throttle = cy_throttle,
5307 .unthrottle = cy_unthrottle,
5308 .set_termios = cy_set_termios,
5311 .hangup = cy_hangup,
5312 .break_ctl = cy_break,
5313 .wait_until_sent = cy_wait_until_sent,
5314 .read_proc = cyclades_get_proc_info,
5315 .tiocmget = cy_tiocmget,
5316 .tiocmset = cy_tiocmset,
5319 static int __init cy_init(void)
5321 struct cyclades_port *info;
5322 struct cyclades_card *cinfo;
5323 int number_z_boards = 0;
5324 int board, port, i, index;
5325 unsigned long mailbox;
5326 unsigned short chip_number;
5329 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5330 if (!cy_serial_driver)
5334 /* Initialize the tty_driver structure */
5336 cy_serial_driver->owner = THIS_MODULE;
5337 cy_serial_driver->driver_name = "cyclades";
5338 cy_serial_driver->name = "ttyC";
5339 cy_serial_driver->major = CYCLADES_MAJOR;
5340 cy_serial_driver->minor_start = 0;
5341 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5342 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5343 cy_serial_driver->init_termios = tty_std_termios;
5344 cy_serial_driver->init_termios.c_cflag =
5345 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5346 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5347 tty_set_operations(cy_serial_driver, &cy_ops);
5349 if (tty_register_driver(cy_serial_driver))
5350 panic("Couldn't register Cyclades serial driver\n");
5352 for (i = 0; i < NR_CARDS; i++) {
5353 /* base_addr=0 indicates board not found */
5354 cy_card[i].base_addr = NULL;
5357 /* the code below is responsible to find the boards. Each different
5358 type of board has its own detection routine. If a board is found,
5359 the next cy_card structure available is set by the detection
5360 routine. These functions are responsible for checking the
5361 availability of cy_card and cy_port data structures and updating
5362 the cy_next_channel. */
5364 /* look for isa boards */
5365 cy_isa_nboard = cy_detect_isa();
5367 /* look for pci boards */
5368 cy_pci_nboard = cy_detect_pci();
5370 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5372 /* invalidate remaining cy_card structures */
5373 for (i = 0; i < NR_CARDS; i++) {
5374 if (cy_card[i].base_addr == 0) {
5375 cy_card[i].first_line = -1;
5376 cy_card[i].ctl_addr = NULL;
5378 cy_card[i].bus_index = 0;
5379 cy_card[i].first_line = 0;
5380 cy_card[i].num_chips = 0;
5383 /* invalidate remaining cy_port structures */
5384 for (i = cy_next_channel; i < NR_PORTS; i++) {
5385 cy_port[i].line = -1;
5386 cy_port[i].magic = -1;
5389 /* initialize per-port data structures for each valid board found */
5390 for (board = 0; board < cy_nboard; board++) {
5391 cinfo = &cy_card[board];
5392 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5394 mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5395 cy_card[board].ctl_addr)->
5397 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5398 cinfo->intr_enabled = 0;
5399 cinfo->nports = 0; /* Will be correctly set later, after
5401 spin_lock_init(&cinfo->card_lock);
5402 for (port = cinfo->first_line;
5403 port < cinfo->first_line + nports; port++) {
5404 info = &cy_port[port];
5405 info->magic = CYCLADES_MAGIC;
5406 info->type = PORT_STARTECH;
5410 info->flags = STD_COM_FLAGS;
5412 if (mailbox == ZO_V1)
5413 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5415 info->xmit_fifo_size =
5426 info->custom_divisor = 0;
5427 info->close_delay = 5 * HZ / 10;
5428 info->closing_wait = CLOSING_WAIT_DELAY;
5429 info->icount.cts = info->icount.dsr =
5430 info->icount.rng = info->icount.dcd = 0;
5431 info->icount.rx = info->icount.tx = 0;
5432 info->icount.frame = info->icount.parity = 0;
5433 info->icount.overrun = info->icount.brk = 0;
5437 info->blocked_open = 0;
5438 info->default_threshold = 0;
5439 info->default_timeout = 0;
5440 INIT_WORK(&info->tqueue, do_softint);
5441 init_waitqueue_head(&info->open_wait);
5442 init_waitqueue_head(&info->close_wait);
5443 init_waitqueue_head(&info->shutdown_wait);
5444 init_waitqueue_head(&info->delta_msr_wait);
5447 info->read_status_mask = 0;
5449 /* Bentson's vars */
5450 info->jiffies[0] = 0;
5451 info->jiffies[1] = 0;
5452 info->jiffies[2] = 0;
5453 info->rflush_count = 0;
5454 #ifdef CONFIG_CYZ_INTR
5455 init_timer(&cyz_rx_full_timer[port]);
5456 cyz_rx_full_timer[port].function = NULL;
5460 } else { /* Cyclom-Y of some kind */
5461 index = cinfo->bus_index;
5462 spin_lock_init(&cinfo->card_lock);
5463 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5464 for (port = cinfo->first_line;
5465 port < cinfo->first_line + cinfo->nports; port++) {
5466 info = &cy_port[port];
5467 info->magic = CYCLADES_MAGIC;
5468 info->type = PORT_CIRRUS;
5471 info->flags = STD_COM_FLAGS;
5473 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5475 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
5477 info->cor3 = 0x08; /* _very_ small rcv threshold */
5480 info->custom_divisor = 0;
5481 info->close_delay = 5 * HZ / 10;
5482 info->closing_wait = CLOSING_WAIT_DELAY;
5483 info->icount.cts = info->icount.dsr =
5484 info->icount.rng = info->icount.dcd = 0;
5485 info->icount.rx = info->icount.tx = 0;
5486 info->icount.frame = info->icount.parity = 0;
5487 info->icount.overrun = info->icount.brk = 0;
5488 chip_number = (port - cinfo->first_line) / 4;
5489 if ((info->chip_rev =
5490 cy_readb(cinfo->base_addr +
5491 (cy_chip_offset[chip_number] <<
5492 index) + (CyGFRCR << index))) >=
5494 /* It is a CD1400 rev. J or later */
5495 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5496 info->tco = baud_co_60[13]; /* Tx CO */
5497 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5498 info->rco = baud_co_60[13]; /* Rx CO */
5500 info->rtsdtr_inv = 1;
5502 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5503 info->tco = baud_co_25[13]; /* Tx CO */
5504 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5505 info->rco = baud_co_25[13]; /* Rx CO */
5507 info->rtsdtr_inv = 0;
5512 info->blocked_open = 0;
5513 info->default_threshold = 0;
5514 info->default_timeout = 0;
5515 INIT_WORK(&info->tqueue, do_softint);
5516 init_waitqueue_head(&info->open_wait);
5517 init_waitqueue_head(&info->close_wait);
5518 init_waitqueue_head(&info->shutdown_wait);
5519 init_waitqueue_head(&info->delta_msr_wait);
5522 info->read_status_mask =
5523 CyTIMEOUT | CySPECHAR | CyBREAK
5524 | CyPARITY | CyFRAME | CyOVERRUN;
5530 #ifndef CONFIG_CYZ_INTR
5531 if (number_z_boards && !cyz_timeron) {
5533 cyz_timerlist.expires = jiffies + 1;
5534 add_timer(&cyz_timerlist);
5536 printk("Cyclades-Z polling initialized\n");
5539 #endif /* CONFIG_CYZ_INTR */
5545 static void __exit cy_cleanup_module(void)
5549 #ifndef CONFIG_CYZ_INTR
5552 del_timer(&cyz_timerlist);
5554 #endif /* CONFIG_CYZ_INTR */
5556 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5557 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5560 put_tty_driver(cy_serial_driver);
5562 for (i = 0; i < NR_CARDS; i++) {
5563 if (cy_card[i].base_addr) {
5564 iounmap(cy_card[i].base_addr);
5565 if (cy_card[i].ctl_addr)
5566 iounmap(cy_card[i].ctl_addr);
5568 #ifndef CONFIG_CYZ_INTR
5569 && cy_card[i].num_chips != -1 /* not a Z card */
5570 #endif /* CONFIG_CYZ_INTR */
5572 free_irq(cy_card[i].irq, &cy_card[i]);
5574 if (cy_card[i].pdev)
5575 pci_release_regions(cy_card[i].pdev);
5579 } /* cy_cleanup_module */
5581 module_init(cy_init);
5582 module_exit(cy_cleanup_module);
5584 MODULE_LICENSE("GPL");
git.openpandora.org / pandora-kernel.git / blob